2. 考虑单层厂房质量集中系数应根据一定的原则确定，在计算结构的动力特性时，应根据（ ）的原则，经过换算分析后确定。 A. “周期等效” B. “弯矩相等” C. “剪力相等” D. “内力相等” ...

3. 某人工挖土工程，单位时间产量定额为2.5m3/工日/工日，其时间定额为（ ）。 A. 0.4工日/m3 B. 0.5工日/m3 C. 0.25工日/m3 D. 2.5工日/m3 ...

28. — _____? — She's our history teacher. A. Where is she from B. Where does the woman work C. Who is she D. How is the woman ...

4. — Why didn't you come to my birthday party yesterday? — _______ A. Excuse me, my friend sent me a flower. B. Fine, I never go to birthday parties. C. Ha…ha, I like swimming. D. Sorry, but my wife had a car accident. ...

26. — What symptoms do you have? — _______ A. My eyes have been red for the past few days. B. I have red eyes for a few days. C. I have a cold. D. I’ve never had any trouble with my health. ...

15. — Must we hand in our homework now? — _______ A. Yes, you will. B. Yes, you mustn’t . C. No, you needn’t. D. No, you mustn’t. ...

6. — Hello, may I have an appointment with the doctor? — _______ A. Sorry, he is busy at the moment. B. Why didn’t you call earlier? C. Certainly. May I know your name? D. Sorry, he doesn’t want to see you. ...

24. — What do you think of your new teacher? — _______ A. He came to teach us last week. B. He teaches us English. C. He has two children. D. He is very nice. ...

15. I don't know the park, but it's______ to be quite beautiful. A. said B. told C. spoken D. talked ...

3. Down the entrance hall of the school walk four eighth-grade students. Each one is carrying a small basket with a single egg inside. Soon more students join them-each one of them is also carrying a basket with an egg. The eggs in a basket...