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问题 选择题

下列各类型地图中能够最直观地表示地面某一点上地势起伏的是（　　）

A．等高线地形图

B．地形剖面图

C．平面示意图

D．分层设色地形图

答案

地形剖面图指沿地表某一直线方向上的垂直剖面图，以显示剖面线上断面地势起伏状况，能直观的表示地面的高低起伏和倾斜缓急．

故选：B．

问答题

如图所示，棒长5m悬挂于O点，B、C两点相距20m，位于悬点正下方，棒的下端A与B点相距20m，将棒从O点放开，在棒下落过程中空气阻力不计，求A端到达B点时速度大小和棒通过BC所需的时间？
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补全对话，情景问答
补全对话.从方框中选择适当的句子完成对话,其中有两项是多余的
A. He loves French very much.
B. Let's return it to her.
C. I agree with you.
D. Look, there is a book on the floor.
E. I don't think so.
F. Is it yours?
G. Whose book is it, do you know?
Lily: Good morning, Tony.
Tony: Good morning, Lily.   1  -
Lily: Oh, it's a French book.
Tony:    2  
Lily: I think it could be Tony's.    3 _
Tony: No, it can't be his. He has been away from school for several days.
Lily: Does it belong to Tom?
Tony: _____4 ___You know he doesn't like French at all.
Lily: Oh, I know. It must be Jenny's.  Look, it has her name on the cover of the book.
Tony: I think you are right.    5    
Lily: OK. Let's go.
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