根据《建设工程工程量清单计价规范》的规定，不属于附录C专业工程的是（）。A．机械设备

标准差与标准误的主要区别在于（）

A.两者是性质完全不同的两类指标

B.标准差能反映一组数值的离散程度，而标准误不能

C.标准误是样本均数的标准差

D.标准误数值受标准差影响，当样本含量一定时，两者成正比例关系

E.标准差大，表示变量值越分散，而标准误大，则均数分布的抽样误差大

Visual Basic对象可以分为两类，分别为【 】和【 】。

阅读理解。

Dear Editor,

     I'm a Senior 1 student in a middle school. This term, my favourite teacher, Miss Mao, no longer teaches

us. I want to see her, but I'm afraid that she no longer likes me and I don't want to trouble her. I really miss

her. What should I do? 

                                                                                                                                             Tian Yan

Dear Tian Yan,

     It's bad luck that you have lost your favourite teacher. But, if she is still in your school, nothing can stop

you going to see her. When she isn't busy, ask her if she minds having a quick chat. You can then tell her

she was your favourite teacher. Everyone is happy to know they are liked!

     If she has left the school, it will be more difficult to meet her. It will be hard, but remember people always

come and go in our lives. We can't rely on (依靠) them being with us all the time.

     You may be sad to say goodbye to her, but we can remember and learn from her. Think of her best

qualities. 

     You could also try looking for similar qualities in your other teachers. Study hard and give your new

teacher a chance. In time, you might start to see that he or she has different qualities to learn from.

      Finally, you can not completely rely on other people getting you through your studies, or even your life. 

                                                                                                                                                Editor

1. Tian Yan ______.

A. is a troublemaker

B. likes Miss Mao very much

C. is happy these days

D. doesn't like to tell her secret to anyone

2. Which of the following does the editor advise Tian Yan NOT to do?

A. Find a time to see Miss Mao.

B. Have a short chat with Miss Mao.

C. Tell Miss Mao she likes her.

D. Keep quiet about the thing.

3. The expression"in time" in this passage means "______".

A. over a period of time

B. on time

C. at the right time

D. a long time ago

4. According to the passage, students can make progress in their studies ______.

A. completely by their favourite teachers

B. completely by their favourite classmates

C. mainly by their parents

D. mainly by themselves

“房抵贷”贷款用途包括（）。

A.购车

B.旅游

C.购买生产设备

D.购买商用车

压杆丧失了稳定，就表示承载能力不足，不能正常工作，甚至突然破坏。