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【简答题】
三相异步电动机星形联接时，线电压是相电压的（）倍，线电流与相电流相等。
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举一反三
【单选题】When moist air moves over a cooler suce, then may occur.
A.
frontal fog
B.
steam fog
C.
advection fog
D.
radiation fog
【单选题】People begin to know that most environmental problems exist because necessary measures for pring them _____ taken in the past. [ ]
A.
are not
B.
were not
C.
hadn't been
D.
wouldn't be
【单选题】When moisture air moves over a cooler suce, then may occur.
A.
advection fog
B.
radiation fog
C.
frontal fog
D.
steam fog
【单选题】Most(75)measures involve data encryption and password.
A.
security
B.
hardware
C.
display
D.
program
【单选题】According to the passage, the comfort zone for most African people ______.
A.
measures about 21 inches
B.
varies from person to person
C.
implies respect
D.
is regulated by status
【单选题】Most ______ measures involve data encryption and password.
A.
security
B.
hardware
C.
display
D.
program
【单选题】When moist air moves over a cooler suce, then ( ) may occur.
A.
Advection fog
B.
Radiation fog
C.
Frontal fog
D.
Steam fog
【单选题】Most environmental problems exist because adequate measures for pring them _________ taken in the past.
A.
was not
B.
were not
C.
were not being
D.
being not
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