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【单选题】
一电容接到f=50Hz的交流电路中，XC=240Ω；若改接到f=150Hz的电源电路中，则XC为（）Ω。A.
80
B.
120
C.
160
D.
720．
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【单选题】Red meat contains more narrow muscle fibers, _______________ white meat contains more broad fibers.
A.
when
B.
while
C.
and
D.
but
【单选题】His diet can not be considered as healthy because it contains a lot of fat _______ meat, cakes and cream.
A.
in terms of
B.
in need of
C.
in the form of
D.
in favor of
【单选题】His diet can not be considered as healthy because it contains a lot of fat ________ meat, cakes and cream. [ ]
A.
in the possession of
B.
in the form of
C.
in the charge of
D.
in the name of
【单选题】The amount of red meat a woman eats is directly proportional to the probability of breast cancer.
A.
Right
B.
Wrong
C.
Not mentioned
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