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2211【全国百强校】重庆市第十八中学2017-2018学年八年级上学期期中考试物理试题及答案868.00KB868.00Bdocczwlzx重庆市第十八中学czwlzx/UploadFiles/UserPic/UserAvatars/15219_150_150.jpg
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重庆市第十八中学1重庆市2017年11月23日/UploadFiles/nopic.gif
意事项:
试题的答案书写在答题卡上
意事项:
试题的答案书写在答题卡上
一、选择题(本题共
12
个小题,每小题只有一个选项符合题意,每小题
3
分,共
36
分)
1
.根据你对生活中物理量的认识,你认为下列数据符合实际情况的是(
)
A
.一个中学生正常骑自行车的速度约
20m/s
【内容简介】
意事项:
试题的答案书写在答题卡上
一、选择题(本题共
12
个小题,每小题只有一个选项符合题意,每小题
3
分,共
36
分)
1
.根据你对生活中物理量的认识,你认为下列数据符合实际情况的是(
)
A
.一个中学生正常骑自行车的速度约
20m/s
B
.升国旗,演奏中华人民共和国国歌用时约
127s
C
.一个足球的直径约
50cm
D
.空气中
PM2.5
是指粒径小于或等于
2.5mm
的可入肺颗粒物
2
.
某同学用分度值为
1cm
的刻度尺测量了一物体长度,共测量了
8
次,记录的结果如下:
5.24dm
、
5.23dm
、
5.2dm
、
5.245dm
、
5.86dm
、
5.25dm
、
5.22dm
、
5.24dm
。则该物体地点长
度是(
)
A
.
5.233dm B
.
5.31dm C
.
5.23dm D
.
5.2325dm
3
.
甲、乙两车匀速同向行驶,甲、乙两车的速度之比是
2:3
,甲、乙两车行驶的时间之比是
5:2
,则甲、乙两车行驶的路程之比是(
)
A
.
4:6 B
.
6:4 C
.
5:3 D
.
3:5
4.如图1所示,木块丙、丁自左向右运动,现用高速摄影机在同一底片上多次曝光,记录下木块每次曝光时的位置。已知连续两次曝光的时间间隔是相等的。图1乙是两木块运动情况的s﹣t 或v﹣t 图像,根据图甲可知图乙正确的是( )
甲
乙
图
1
A B C D
5
.
甲、乙两船相距
5km
,在同一河流同时起航,且保持船速不变。若两船同时在逆水中航行,经过时间
t
1
甲船恰好赶上乙船,若两船同时在顺水中航行,甲船赶上乙船时,需要时间
t
2
,则(
)
A
.
t
1
=t2 B
.
t
1
>t2 C
.
t
1
意事项:
试题的答案书写在答题卡上
一、选择题(
<p><em>所属专辑:</em>
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《2017-2018学年八年级上学期期中考试物理试题》专辑
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</p>
下载地址1|sj/2017/11/201711231039528094.doc<p align="left" class="MsoNormal" style="text-align: left; line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: ">
<span style="font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">意事项:</span>
<span lang="EN-US" style="color: black">
</span>
</p>
<p align="left" class="MsoNormal" style="text-align: left; line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: ">
<span style="font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">试题的答案书写在答题卡上</span>
<span lang="EN-US" style="color: black">
</span>
</p>
<p align="left" class="MsoNormal" style="text-align: left; line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: ">
<b style="mso-bidi-font-weight: normal">
<span style="font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">一、选择题(本题共</span>
<span lang="EN-US" style="color: black">12</span>
</b>
<b style="mso-bidi-font-weight: normal">
<span style="font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">个小题,每小题只有一个选项符合题意,每小题</span>
<span lang="EN-US" style="color: black">3</span>
</b>
<b style="mso-bidi-font-weight: normal">
<span style="font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">分,共</span>
<span lang="EN-US" style="color: black">36</span>
</b>
<b style="mso-bidi-font-weight: normal">
<span style="font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">分)</span>
<span lang="EN-US" style="color: black">
</span>
</b>
</p>
<p align="left" class="MsoNormal" style="text-align: left; line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: ">
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">1</span>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">.根据你对生活中物理量的认识,你认为下列数据符合实际情况的是(</span>
<span style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">
<span lang="EN-US">
<span style="mso-spacerun: yes"> </span>
<span style="mso-spacerun: yes"> </span>
</span>
</span>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">)</span>
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">
</span>
</p>
<p align="left" class="MsoNormal" style="text-align: left; line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: ">
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">A</span>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">.一个中学生正常骑自行车的速度约</span>
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">20m/s </span>
</p>
<p align="left" class="MsoNormal" style="text-align: left; line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: ">
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">B</span>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">.升国旗,演奏中华人民共和国国歌用时约</span>
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">127s </span>
</p>
<p align="left" class="MsoNormal" style="text-align: left; line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: ">
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">C</span>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">.一个足球的直径约</span>
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">50cm </span>
</p>
<p align="left" class="MsoNormal" style="text-align: left; line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: ">
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">D</span>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">.空气中</span>
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">PM2.5</span>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">是指粒径小于或等于</span>
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">2.5mm</span>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">的可入肺颗粒物</span>
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">
</span>
</p>
<p align="left" class="MsoNormal" style="text-align: left; line-height: 150%; margin: 0cm 0cm 4pt">
<span lang="EN-US">2</span>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">.</span>
<span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">某同学用分度值为</span>
<span lang="EN-US">1cm</span>
<span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的刻度尺测量了一物体长度,共测量了</span>
<span lang="EN-US">8</span>
<span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">次,记录的结果如下:</span>
<span lang="EN-US">5.24dm</span>
<span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span>
<span lang="EN-US">5.23dm</span>
<span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span>
<span lang="EN-US">5.2dm</span>
<span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span>
<span lang="EN-US">5.245dm</span>
<span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span>
<span lang="EN-US">5.86dm</span>
<span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span>
<span lang="EN-US">5.25dm</span>
<span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span>
<span lang="EN-US">5.22dm</span>
<span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span>
<span lang="EN-US">5.24dm</span>
<span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。则该物体地点长</span>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">度是(</span>
<span style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">
<span lang="EN-US">
<span style="mso-spacerun: yes"> </span>
<span style="mso-spacerun: yes"> </span>
</span>
</span>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">)</span>
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">
</span>
</p>
<p align="left" class="MsoNormal" style="text-align: left; line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: ">
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">A</span>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">.</span>
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">5.233dm<span style="mso-tab-count: 3"> </span>B</span>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">.</span>
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">5.31dm<span style="mso-tab-count: 3"> </span>C</span>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">.</span>
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">5.23dm<span style="mso-tab-count: 3"> </span>D</span>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">.</span>
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">5.2325dm </span>
</p>
<p align="left" class="MsoNormal" style="text-align: left; line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: ">
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">3</span>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">.</span>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">甲、乙两车匀速同向行驶,甲、乙两车的速度之比是</span>
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">2:3</span>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">,甲、乙两车行驶的时间之比是</span>
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">5:2</span>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">,则甲、乙两车行驶的路程之比是(</span>
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">
<span style="mso-spacerun: yes"> </span>
<span style="mso-spacerun: yes"> </span>
<span style="mso-spacerun: yes"> </span>
</span>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">)</span>
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">
</span>
</p>
<p align="left" class="MsoNormal" style="text-align: left; line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: ">
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">A</span>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">.</span>
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">4:6<span style="mso-tab-count: 4"> </span>B</span>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">.</span>
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">6:4 <span style="mso-tab-count: 4"> </span>C</span>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">.</span>
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">5:3 <span style="mso-tab-count: 2"> </span> <span style="mso-tab-count: 2"> </span>D</span>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">.</span>
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">3:5 </span>
</p>
<p align="left" class="MsoNormal" style="text-align: left; line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: ">
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">4</span><span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">.</span><span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">如图</span><span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">1</span><span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">所示,木块丙、丁自左向右运动,现用高速摄影机在同一底片上多次曝光,记录下木块每次曝光时的位置。已知连续两次曝光的时间间隔是相等的。图</span><span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">1</span><span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">乙是两木块运动情况的</span><span style="line-height: 150%; color: black; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt"></span><span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">s</span><span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">﹣</span><span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">t </span><span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">或</span><span style="line-height: 150%; color: black; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt"></span><span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">v</span><span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">﹣</span><span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">t </span><span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">图像,根据图甲可知图乙正确的是(</span><span style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt"><span lang="EN-US"><span style="mso-spacerun: yes"> </span><span style="mso-spacerun: yes"> </span></span></span><span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">)</span><span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">
</span></p>
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<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">
</span>
</p>
<p align="left" class="MsoNormal" style="text-align: left; line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: ">
</p>
<p> </p>
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<td style="border-bottom: #f0f0f0; border-left: #f0f0f0; background-color: transparent; border-top: #f0f0f0; border-right: #f0f0f0">
<div class="shape" style="padding-bottom: 4.35pt; padding-left: 7.95pt; padding-right: 7.95pt; padding-top: 4.35pt" v:shape="文本框_x0020_23">
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<span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">甲</span>
<span lang="EN-US">
</span>
</span>
</p>
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<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">
</span>
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<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">
</span>
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<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">
</span>
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<br clear="all" style="mso-ignore: vglayout" />
</p>
<p class="MsoNormal" style="line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: ">
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">
</span></p>
<p class="MsoNormal" style="line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: ">
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">
</span>
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<p class="MsoNormal" style="line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: ">
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">
</span>
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<p class="MsoNormal" style="line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: ">
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">
</span>
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<p class="MsoNormal" style="line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: ">
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">
</span>
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<span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">乙</span>
<span lang="EN-US">
</span>
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</p>
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<p class="MsoNormal" style="margin: 0cm 0cm 0pt">
<span style="z-index: 251649024; position: absolute; left: 0pt; mso-ignore: vglayout">
<span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">图</span>
<span lang="EN-US">1 </span>
</span>
</p>
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</td>
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<p>
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">A<span style="mso-spacerun: yes"> </span>B<span style="mso-spacerun: yes"> </span>C<span style="mso-spacerun: yes"> </span> <span style="mso-spacerun: yes"> </span>D </span>
</p>
<p class="MsoNormal" style="line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: ">
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">
</span>
</p>
<p class="MsoNormal" style="line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: ">
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">
</span>
</p>
<p class="MsoNormal" style="line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: ">
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">5</span>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">.</span>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">甲、乙两船相距</span>
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">5km</span>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">,在同一河流同时起航,且保持船速不变。若两船同时在逆水中航行,经过时间</span>
<i style="mso-bidi-font-style: normal">
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">t</span>
</i>
<sub>
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">1</span>
</sub>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">甲船恰好赶上乙船,若两船同时在顺水中航行,甲船赶上乙船时,需要时间</span>
<i style="mso-bidi-font-style: normal">
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">t</span>
</i>
<sub>
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">2</span>
</sub>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">,则(</span>
<span style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">
<span lang="EN-US">
<span style="mso-spacerun: yes"> </span>
<span style="mso-spacerun: yes"> </span>
</span>
</span>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">)</span>
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">
</span>
</p>
<p align="left" class="MsoNormal" style="text-align: left; line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: ">
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">A</span>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">.</span>
<i style="mso-bidi-font-style: normal">
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">t</span>
</i>
<sub>
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">1</span>
</sub>
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">=<i style="mso-bidi-font-style: normal">t</i><sub>2</sub><span style="mso-tab-count: 3"> </span>B</span>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">.</span>
<i style="mso-bidi-font-style: normal">
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">t</span>
</i>
<sub>
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">1</span>
</sub>
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">><i style="mso-bidi-font-style: normal">t</i><sub>2</sub><span style="mso-spacerun: yes"> </span><span style="mso-tab-count: 4"> </span>C</span>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">.</span>
<i style="mso-bidi-font-style: normal">
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">t</span>
</i>
<sub>
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">1</span>
</sub>
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt"><<i style="mso-bidi-font-style: normal">t</i><sub>2</sub><span style="mso-spacerun: yes"> </span><span style="mso-tab-count: 3"> </span>D</span>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">.</span>
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">以上说法都有可能</span>
</p>
<p align="left" class="MsoNormal" style="text-align: left; line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: ">
<span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">............</span>
<span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">
</span>
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