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问题 实验题

（18分）（1）（8分）“探究合力与分力的关系”的实验如图甲所示，用两把互成角度的弹簧秤把结点P拉到位置Ｏ。

①从图甲可读得弹簧秤Ｂ的示数为     Ｎ。

②为了更准确得到合力与分力的关系，要采用作力的   （填“图示”或“示意图”）来表示分力与合力。

③图乙中与F1、F2效果相同的力是       (填“F”或“F′”)。

④图乙中方向一定沿AO方向的力是       (填“F”或“F′”)。

答案

（1）① 3.8N② 图示 ③④

题目分析：（1）弹簧测力计的示数为3.8N；②为了更准确得到合力与分力的关系，要采用作力图示来表示分力与合力。③实验中是与效果相同的力，F只是理想情况下的合力④图乙中一定沿AO方向的力是在做实验过程中实际施加的作用力即。

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配对阅读。左栏是对5个学生做演讲时存在问题的描述，请在右栏为每个学生选择一个合适的建议，并将答题卡上对应题目所选的选项涂黑。
小题1:Paul: I don’t think I can talk fluently(流利) because it’s difficult for me to remember all the words.
小题2:Billy: When I come face to face with the audience, where should my eyes fall upon? Do I have to look front, or look around from time to time?
小题3:Amy: When I am talking, I can’t help waving my hands, for I think it can help me express what I want to say better. But my classmates say I look funny and foolish by doing this.
小题4:Betty: I know that it’s not right to speak fast. But I am afraid that I can’t finish my talk in the given time if I speak slowly.
小题5:Tony: Should I talk in American English or British English?
A．Looking at and talking to one person in the audience helps keep you natural, but it feels foolish talking to only one person. Speak to that person as long as 15 seconds and then change another one.
B．The audience have a hard time understanding what they hear. They need your help. Slow down, pause(停顿) and guide the audience through your talk. Remember that you should help the audience understand what you are saying.
C．Make your voice a little lower than normal. Listeners like to listen to a relatively(相对) deep voice.
D．When you talk, try to be as natural as possible. Don’t try to memorize your words and read or recite them to your audience. You can use short notes to help you remember the important points.
E. You should know you and most of the people you talk to are different in many ways. Some of them may not know what you are talking about. Then speak to them on their terms and in their languages.
F. Concentrate on what you want to say. If you are always paying attention to gestures(手势),you will feel uncomfortable.
G. It’s true that there are some differences between American English and British English, but they’ll not cause much difficulty for listeners, so just speak the way you’re used to.
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多项选择题

下列对意外险保险金额描述正确的是（）

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C、国内旅游：每位旅游者10万元人民币

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E、登山探险旅游：每位旅游者3万元人民币
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