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【单选题】
可以频繁通断负荷电路和大容量控制电路、便于实现远距离控制的开关电器是A.
断路器
B.
低压断路器
C.
接触器
D.
负荷开关
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反馈参考答案：
举一反三
【单选题】Thank you for all your hard work last week. I don’t think we ______ it without you.
A.
could have managed
B.
can manage
C.
could manage
D.
can have managed
【单选题】Thank you for all your hard work last week. I don’t think we ______ it without you. [ ]
A.
could have managed
B.
can manage
C.
can have managed
D.
could manage
【单选题】Thank you for all your hard work last week. I don’t think we ____ it without you.
A.
can manage
B.
could have managed
C.
could manage
D.
can have managed
【单选题】．---I give up. It’s too hard. ---Really? I__________you could make it through.
A.
think
B.
thought
C.
have thought
D.
am thinking
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