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问题 单项选择题

按工作原理分类，UPS有多种类型，通信设备选用的类型通常为（）。

A、在线式

B、后备式

C、在线互动式

D、混合类型

答案

参考答案：A

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Xuanwu Lake
Price: Adults￥30       Children￥20
Open: 6:00 a.m.～ 7:00 p.m. every day
Hongshan Forest Zoo
Price:￥25
Open: 8:00 a.m.～ 4:30 p.m. every day
 
Zijin Mountain Observatory
Price: Adults ￥15       Children￥10
Open: 9:00 a.m.～ 5:00 p.m. every day
 
小题1: You have 15 yuan ,where can you go?
A．the Zijin Mountain ObservatoryB．the Xuanwu Lake
C．the Hongshan Forest ZooD．A and B
小题2:If your parents and you go to the Xuanwu Lake, you should spend ____ yuan on tickets(票).
A．50.B．60.C．70.D．80.
小题3:You can go to the Zijin Mountain Observatory at _______.
A．5:00 a.m.B．6:00 p.m.C．1:00 p.m.D．7:30 a.m.
小题4:Jack wants to see the monkey, he can go to_______.
A．the Hongshan Forest ZooB．the Xuanwu Lake
C．the Zijin Mountain ObservatoryD．A, B and C
小题5: It's fine today, Jack and his friends want to go boating. You can go to _______ to look for them.
A．the Zijin Mountain ObservatoryB．the Xuanwu Lake
C．the Hongshan Forest ZooD．A and B
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单项选择题

处理抽油机井刹车不灵活或自动溜车故障时，调整刹车行程在（）处。

A、1/3

B、1/2

C、1/3～1/2

D、1/3～2/3
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