12315信息化网络的建设目标是努力搭建集（）于一体的综合性调度指挥系统。 A.申诉

有助于尽快明确诊断的检查首选

A．CT

B．磁共振

C．胸腔镜

D．纤支镜

E．核素扫描

鸦片战争后“西学东渐”局面形成的根本原因是 [ ]

A．西方列强的侵略

B．利玛窦的推动

C．抵抗派的宣传

D．洋务派的推动

写出相应的问句或答句。

1. We stayed in Tibet for ten days last year. (划线提问)

     __________ __________ ___________ you _________ in Tibet last year?

2. A: __________ __________ the weather yesterday?

    B: It was windy.

3. A: _________ it often __________?

    B: No, it seldom rains.

4. A: _________ the high __________?

    B: It's 31℃.

The teacher asked me if _____ finished my homework. [ ]

A. I have

B. have I

C. I had

D. had I

集中式空调系统中，（）机制空调系统所处理的空气全部来自室外，室外空气经处理后送入室内，使用后全部排出室外。

A.封闭式

B.直流式

C.对流式

D.混合式