硬化混凝土抗冻性的主要影响因素是（）。A.水泥品种 B.水灰比 C.骨料弹性模量 D

用括号内所给单词的适当形式填空。

1. My mother goes to Beijing _________ (two) a year.

2. Thanks a lot for _________ (teach) us so well, Miss Green.

3. He would like _________ (have) a cup of tea.

4. Today is Tom's _________ (fourteen) birthday.

5. You should exercise to stay _________ (health).

6. My father _________ (buy) some DVDs for me yesterday.

7. How many _________ (mile) is it from your home to your school?

8. Taking a boat must be a lot _________ (much) fun than taking a bus.

9. Thanks for your _________ (invite) to your house next week.

10. You should help your sister when she _________ (need) help.

2010年4月14目，青海玉树发生7.1级地震。党中央、国务院迅速作出工作部署，组织和协调开展抗震救灾工作，千方百计救援受灾群众，切实安排好受灾群众生活，维护灾区社会稳定。这表明中 * * 党

A．履行社会公共服务的职能

B．履行组织社会主义经济建设的职能

C．以人为本、执政为民

D．支持和保证人民当家作主

It was not until she arrived at the classroom she realized she had forgotten her coursebook.

A．and she realized

B．which she realized

C．then she realized

D．that she realized

将路由器划分为中间节点路由器、边界路由器的分类方法是按照转发报文的性能来划分的。（）

电源的内阻越小越好。