已知有三种微粒的结构示意图如下： (1)请选用A、B、C序号填空： ①属于同一元

阅读理解。

1. When does the train X504 leave Washington?

A.  9:00.

B.  9:30.

C. 10:00.

D. 10:30.

2. If you have to get to New York before 12:00, you'd better take _________.

A. X500

B. X501

C. X502

D. X503

3. Which of the following trains does not stop at BWI Airport?

A. X502.

B. X503.

C. X504.

D. X505.

4. If you want to go on weekends, you can NOT choose _________.

A. X501

B. X502

C. X503

D. X504

5. Which of the following is true according to the timetable?

A. You can have meals on most of the trains.

B. Most of the trains do not stop at Neward Int'l Airport.

C. You can't buy a ticket at the stations without reservation.

D. Nobody can get from Princeton Junction to Metropark on January 30.

海因里希认为，企业事故预防工作的中心就是（），（），中断事故连锁的进程而避免事故的发生。

下列关于子项目的说法都是正确的，除了( )。

A．子项目的划分便于把部分工作发包给外部企业
B．项目生命周期中的一个阶段可以被作为一个子项目
C．需要使用同样人力资源(如水电安装工人)的工作，可以被作为子项目
D．划分子项目，有利于减少管理工作量，降低管理成本

—Would you like to tell me which sweater you like, the red one or the blue one?

—_________. I like the green one.

A．Both

B．Each

C．None

D．Neither

颈动脉窦位于（）

A.颈总动脉

B.颈总动脉分叉处

C.颈内动脉起始处

D.颈外动脉起始处

E.颈总动脉后方