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【单选题】
低压断路器的脱扣器其中电磁脱扣器又称短路脱扣器或瞬时过流脱扣器，起()保护作用。A.
欠压
B.
失压
C.
过载
D.
短路
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【简答题】Silence is unnatural to man. He begins life with a cry and ends it in stillness. In between he does all he can to make a noise in the world, and he fears silence more than anything else. Even his conv...
【简答题】两个以上的专利申请人分别就同样的发明创造在中国申请专利的，专利权应授予（ ）。
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【单选题】Robert says he bought these books in a _________.
A.
disposal
B.
bargain
C.
reduction
D.
sale
【单选题】He begins the speech by ________ .
A.
apologising
B.
explaining the day's schedule
C.
saying what he's going to talk about
【简答题】The secretary suggested that he (come) ______ ten minutes before the lecture begins.
【判断题】A merchandising company's operating cycle begins with the sale of merchandise and ends with the collection of cash from the sale.
A.
正确
B.
错误
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