一个三位小数保留两位小数约是0.40，这个三位小数最大是（）

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问题填空题

一个三位小数保留两位小数约是0.40，这个三位小数最大是（　　）

A．0.490

B．0.399

C．0.404

答案

：“四舍”得到的0.40最大是0.404，“五入”得到的0.40最小是0.395，

所以一个三位小数保留两位小数约是0.40，这个三位小数最大是0.404．

故选：C．

选择题

有关右图中的描述正确的是（　　）

A．a是入射光、b是反射光、c是折射光、QP是法线

B．a是入射光、b是反射光、d是折射光、QP是法线

C．a是入射光、e是反射光、c是折射光、MN是法线

D．a是入射光、b是反射光、e是折射光、QP是法线

补全对话，情景问答

情景交际：补全对话，每空一词。

A: __1__ will happen if we have an English party this evening ?

B: Many students won't __2__, I think.

A: Why?

B: Because we'll have a math test tomorrow morning and we have to __3__ for it,

A: But I called Mr. Wang, our English teacher. He __4__ to come.

B: Give him a call now. And tell him __5__ it.

A: But when is a good time to have __6__?

B: __7__ have it tomorrow evening. And I can help you to organize it well.

A: I'm so __8__ to hear that. What shall l wear to the party, then?

B: You'd __9__ wear the school clothes.

A: What do you think of my new pants? __10__ very cool.

B: I don't think so. School children should wear school uniforms while in school.

A: All right.