石灰、石膏只适宜在( )硬化。(A) 水中(B) 潮湿空气中(C) 空气中(D)

机动车上路行驶时，前排乘车人可不系安全带。

Professional sports are very popular in the United States and they are big business. The most popular sports are basketball, football and baseball. ___1___ has its own season. And ___2___ supporters. Professional teams are named for the cities ___3___ they are located. When a team plays in a championship game, most people in the city ___4___ the game with interest and enthusiasm. Basketball is ___5___ around the world. Professional basketball games in the US ___6___ indoors during winter months. From November to April ___7___ can find a professional basketball game several nights a week in most large ___8___ cities. Basketball is an American sport. It ___9___ the national pastime.

The game is played in the evening ___10___ every night of the week and ___11___ weekends as well. The season begins in April and ___12___ in the October. Football ___13___ most popular professional sport in the US. It is played on Sundays ___14___ the fall from August to January. American football is different ___15___ international football, ___16___ Americans called soccer. Both games require ___17___ and specialized skills. Professional players are very ___18___.The most famous players ___19___ millions of dollars for their playing skill. American best players have higher ___20___ than the country’s president.

1. A. Every     B. Both   C. Each   D. All

2. A. million   B. millions     C. million of   D. millions of

3. A. when      B. where C. who    D. whose

4. A. follow    B. walk   C. run     D. jump

5. A. well-known   B. well    C. known       D. fame

6. A. played    B. is played    C. plays   D. are played

7. A. somebody      B. one     C. anyone       D. everybody

8. A. America B. England     C. American   D. English

9. A. was called      B. has been called   C. is called     D. be called

10. A. nearly   B. close   C. closely       D. near

11. A. at  B. in       C. on      D. during

12. A. finish   B. finishing    C. finished      D. finishes

13. A. became B. is become   C. is becoming       D. has become

14. A. during  B. while  C. on      D. at

15. A. of B. from   C. with    D. about

16. A. when    B. that     C. where D. which

17. A. strong   B. strength    C. strengthen  D. stronger

18. A. well pay      B. good pay  C. well paid    D. good paid

19. A. make    B. had     C. got     D. received

20. A. money  B. salaries       C. pay     D. wage

茎细长平卧地面，沿水平方向蔓延生长，节上生有不定根（）

A.缠绕茎

B.攀援茎

C.匍匐茎

D.直立茎

血小板无力症实验室检查最主要的异常是

A．出血时间延长
B．血小板聚集功能减低
C．血块退缩不良
D．血小板粘附功能降低
E．血小板平均容积(MPV)减低和血小板分布密度(PDW)减小

进行人工叫醒服务时，若无人应答，应隔（）再人工叫醒一次。

A、2分钟

B、3分钟

C、5分钟

D、l0分钟