很多人认为事先做计划会很浪费时间，事实上，提前做好计划可以减_爱下问搜题

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问题单项选择题

很多人认为事先做计划会很浪费时间，事实上，提前做好计划可以减少工作所用的总时间。行动之前先进行头脑热身，构想好要做之事的每个细节，梳理清楚思路，这样当我们行动时，便会得心应手。

A．细节决定成败

B．考虑问题要周到

C．行动离不开理论的指导

D．事先做好计划可提高工作效率

答案

参考答案：D

补全对话，情景问答

情景反应。

1. — Sorry, I don't know.

— _____.

A. Thank you.

B. Why not know　

C. Thank you all the same

D. Not at all

2. — Let's have sports.

— _____.

A. All right

B. That's right

C. That's all right

D. You're right

3. — May I speak to Mr. Li?

— _____. 　　

A. Yes, I am. 　　

B. No, you may not 　

C. Sorry, he isn't here　

D. Sure, he is out

4. — Who's that?

— _____. 　

A. This is Tom

B. It's Lily

C. That's Kate

D. It's me

5. — Yes, it's mine.

— _____ 　

A. Give you.

B. Here you are.　

C. Where is it?

D. Whose is it?

6. — Do you speak Chinese?

— _____.

A. Yes, only a little 　　

B. Yes, only a few

C. No, I can't 　　　

D. No, you don't

7. — _____?

— She's an office worker.

A. What are you 　　

B. What does she do

C. How do you do 　　

D. How is she

8. — _____?

— Of course, here you are.

A. May I have a look

B. Would you like to have a picnic

C. May I take your order

D. Could you do me for a favor

9. — Can I help you?

— _____.

A. I need a few things

B. I think so

C. I'm looking for a shirt for my son

D. How much do you want for the watch

10. — Oh, sorry. Here is your change.

— _____.

A. It doesn't matter

B. You're welcome

C. It's very kind of you

D. Thanks a lot

选择题

如图所示，AB是一质量为m的均匀细直杆，A端靠在光滑的竖直墙壁上，B端置于水平地面上，杆身与竖直方向夹角为θ，杆与地面的摩擦系数为μ，保持平衡，则此时杆与地面的摩擦力为（　　）

A．mgtgθ

B．mgsinθ

C．μmg

D．μmg