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【单选题】
电介质极化强弱的参数是（ ）A.
击穿场强
B.
相对介电常数
C.
率
D.
介质损失角正切
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反馈参考答案：
举一反三
【单选题】William became king of England .
A.
after the battle of Hastings
B.
before Harold was king
C.
before the Vikings settled in Normandy
D.
all of the above
【单选题】William McKinely quickly became known as a champion of protective traffics.
A.
foe
B.
nullifer
C.
(an) advocate
D.
plotter
【单选题】William Conqueror won the Battle of (), then he became the first Norman King.
A.
Hastings
B.
Stamford Bridge
C.
London
D.
Westminster
【单选题】已知c(1/6K2Cr2O7)=0.1200mol/L,那么该溶液对FeO的滴定度为( )mg/ml,M(FeO)=71.84g/mol
A.
8.621
B.
17.24
C.
25.86
D.
51.72
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