按噪声产生的机理，可分为：机械噪声、（）、电磁噪声。A、振动噪声； B、工业噪声；

( Da Wei comes across Li Lei, who is studying, in the school library. )

A: Hi, Li Lei. Are you busy with your homework now?

B: Oh, yeah, Da Wei. And you?

A: I'm here for a book. Hey, Li Lei. Have a break! We should be outside in the fresh air. It's good for us.

B: Sorry, I can't.    1     I must hand it. in tomorrow.

A: Oh, I see. But we can't always stay indoors.  We must often take exercise.    2  

B: Never.  I hardly have time now.  A sea of homework almost takes up all my free time.  It's sad but that's life.   3   

A: You mean my life? In fact, I'm also very busy like you. But you know I like sports.    4     When ever I have a little time, I will try them.

B: No wonder you are so energetic.

A: Yeah, better health, better grades.     5   

B: Yes, you are right.  It sounds as if should also try to exercise often in the future.  Da Wei, shall we play basketball for a while now?

A: OK. Let's go!

A．How about your life?

B．I like jumping, running, playing basketball and so on.

C．Why not walk in the fresh air?

D．How often do you exercise? E.. Do you agree with me?

F. I have to finish my homework first.

G. Sounds like great fun!

通过贷款分类可以揭示贷款的（）和风险程度，真实、全面、动态地反映贷款质量。

A.利润水平

B.实际价值

C.不良性质

D.贷款质量

根据句子意思，用括号中所给单词的适当形式填空，并将答案填写在答题卡的相应位置上。

If you don’t tell me what the problem is, I can’t   小题1:  (help) you.

Miss Li is a kind teacher and she always talks to us  小题2:   (gentle).

The teacher told us that the gravity on Mars  小题3:   (be) only about three-eighth of that on Earth.

Mr Black has been in China for three years and now he is used to   小题4:   (eat) Chinese food.

The Eiffel Tower, a cultural icon of France, was completed at the end of the    小题5:  (nineteen) century.

It is worth    小题6:  (mention) that Nanjing has entered Top 10 Appealing Chinese Cities.

1937年8月25日，中央军委发布红军改编为国民革命军第八路军的命令，八路军副总指挥是（）

A、彭德怀

B、朱德

C、叶剑英

D、左权

对9位青少年的身高Y与体重X进行观测，并已得出以下数据：

要求：

对回归系数β₂进行显著性检验。