火灾应急广播扬声器应按（）要求设置。 A.民用建筑公共场所内的扬声器额定功率不应小于

关于电路的说法错误的是[ ]

A．电源是提供电能的装置          

B．只要有电压，电路中就一定会有电流

C ．电路接通后, 电流从电源的正极通过用电器流向电源的负极

D ．给电瓶车充电，就是将电能转化为化学能的过程

根据原文含义，桃花汤证中应有（）

A.口渴

B.下利不止

C.腹痛

D.小便不利

E.便脓血

补全对话。

T-Tina  M-Mary

M:     1     did you go on your trip?

T: I     2     to the mountains. How about you?

M: I visited the aquarium. What did you do there?

T: I went hiking and had a picnic.

M: That     3     fun.

T: What did you see there？

M: I     4     some sharks, seals and a big octopus. Then we watched a dolphin show.

T: What else did you do?

M: We watched a movie about sharks. It was interesting.

T: Oh, did you take any     5     ？

M: Yes, I'll show you some.

T: Great!

1.______2.______3.______4.______5.______

“运输工具名称”栏应填（）。

A．江海运输

B．EAST EXPRESS

C．EASTEXPRESS2000.11.16

D．EAST EXPRESS/151E

工程实际中产生弯曲变形的杆件，如火车机车轮轴、房屋建筑的楼板主梁，在得到计算简图时，需将其支承方式简化为：（）

A、简支梁

B、轮轴为外伸梁，楼板主梁为简支梁

C、外伸梁

D、轮轴为简支梁，楼板主梁为外伸梁