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问题 判断题

当UPS中蓄电池的可供使用容量大部分放掉时，又遇市电供电中断由电池供电时，UPS可以继续处于重载条件下运行，并不会引发电池故障或内部逆变器故障。（）

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填空题

从方框中选择适当的句子,补全对话(共5小题,每小题1分)

A: Hey, Lucy! What are you doing for vacation?

B: 1  I'm leaving on Friday. How about you?

A: I'm going sports camping.

B: Oh, cool!

A: 2

B: I'm going with my mother.

A: 3

B: On the eleventh.

A: 4 What about Tom? 5.

B: He's going to the beach with his family.

A．When are you going?

B．Sounds great!

C．Who are you going with?

D．We are leaving this weekend.E. Where is he going for vacation?

F. I'm visiting my cousins in Canada.
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单项选择题

自动配平系统（）.

A.可以自动配平飞机重量和重心位置变化引起的不平衡力矩

B.可以自动配平由于放副翼引起的不平衡力矩

C.控制水平安定面，以增大升降舵的铰链力矩

D.可以保证飞机飞行速度的稳定
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