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【判断题】
三相异步电动机的功率因数cosψ 1 总是滞后的。( )A.
正确
B.
错误
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参考解析：
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皮皮学刷刷变学霸
举一反三
【单选题】We usually cover the Christmas trees ____ colour lights. [ ]
A.
in
B.
use
C.
for
D.
with
【单选题】—What can we cover the roof _______? —The rain is too heavy. [ ]
A.
in
B.
with
C.
on
D.
for
【单选题】The book aims to cover all of the life in the city. [ ]
A.
aspects
B.
responses
C.
expectations
D.
areas
【单选题】The wild flowers looked like a soft orange blanket ________ the desert. A. covering B. covered C. cover D. to cove
A.
covering
B.
covered
C.
cover
D.
to cover
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