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【判断题】
高压隔离开关没有专门的灭弧装置，因此不允许带负荷操作。A.
正确
B.
错误
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】听力原文：M: Did you hear about the air crash that occurred in South America recently? It was quite a tragic accident! W: No, I didn't see anything in the news about it. What happened? M: A foreign airline...
A.
Bad weather.
B.
Human error.
C.
Breakdown of the engines.
D.
Communications system failure.
【多选题】在剖视图中,以下哪些情况可以省略标注或者不必标注?
A.
当剖视图按投影位置关系配置，中间又没有其他图形隔开，可省略投射方向
B.
当单一剖切平面通过机件的对称面或者基本对称面，并且剖视图按投影位置关系配置，中间又没有其他图形隔开时，剖切符号不必标注
C.
当单一剖切平面的剖切位置明确时，局部剖视图的剖切符号不必标注
D.
当两个相交的平面剖切机件时，全剖视图的剖切符号不必标注
【单选题】听力原文：W: Did you hear the weather forecast? M: Yes, they said it would be slightly above freezing tomorrow. Q: What kind of weather are they having? (16)
A.
Cold.
B.
Warm.
C.
Hot.
D.
Mild.
【单选题】用“几个相交的剖切平面”画剖视图,说法正确的是:( )
A.
应画出剖切平面转折处的投影
B.
可以出现不完整结构要素
C.
可以省略标注剖切位置
D.
当两要素在图形上具有公共对称中心线或轴线时，可各画一半
【单选题】I wonder why Jack always gets good marks when he does only ______ the others. [ ]
A.
half as much as
B.
as much as half
C.
half as many as
D.
as many as half
【单选题】―Did you hear the news? Liu Mei is going to move to Canada. ―________. [ ]
A.
I’m sorry to hear that
B.
Have a good time
C.
I don’t believe it
D.
I’m not interested
【单选题】—______, everybody. You did very well in this class performance. —Thank you. [ ]
A.
I'm sorry to hear that
B.
Well done
C.
That's a good idea
D.
The same to you
【单选题】听力原文：M: Did you hear about the air crash that occurred in South America recently? It was quite a tragic accident! W: No, I didn't see anything in the news about it. What happened? M: A foreign airline...
A.
Bad weather.
B.
Human error.
C.
Breakdown of the engines.
D.
Failure of the communications system.
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