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问题 选择题

如图所示,质量为m的木块A放在斜面体B上,若A和B沿水平方向以相同的速度v0一起向左做匀速直线运动,则A和B之间的相互作用力大小为(   )

A．mg

B．mgsinθ

C．mgcosθ

D．0

答案

答案：A

对A物体受力分析如图所示.因为A做匀速直线运动,所以处于平衡状态.因此Fm和F′的合力为mg,选A.

阅读理解

If you go to England, you may want to visit Big Ben. Big Ben is not the name of a man but a name of the clock in London. It has a long history of about 150 years. It is at the north end of the Palace of Westminster（威斯敏斯特）. The big clock has four faces. So you can read the face of the chock everywhere.The hands of it are about four meters（米）long.When the new year comes, it chimes to welcome the start of the new year. There are also many fireworks over the clock tower.

The big clock makes a very loud sound “Ding dong.Ding dong”-the clock gives the sound every 15 minutes of an hour.

小题1:Ｗhat is Big Ben?

A．A man

B．A tower

C．A clock

D．A plane小题2:How long are the hands of Big Ben?

A．2 meters

B．4 meters

C．15 meters

D．16 meters小题3:Which of the following is True about Big Ben?

A．It has three faces.

B．It’s in the UK.

C．It gives the sound every 30 minutes

D．It is about 200 years old.小题4:What dose the underlined word chimes mean?

A．微笑

B．报时

C．呐喊

D．跑步小题5:What’s the best title（标题）of the passage？

A．The clock tower

B．The palace of the westminster

C．Clock hands

D．Big Ben
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单项选择题

个人自用车贷款以所购车辆抵押或质押方式担保的，借款人的首付比例至少为购车价款的（）。

A、10%

B、20%

C、30%

D、40%
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