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【单选题】
为了保障人身安全，在正常情况下，电气设备的安全电压规定为( )。A.
12V以下
B.
36V以下
C.
48V以下
D.
6V以下
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举一反三
【单选题】Even the mechanic couldn’t figure ______ what had gone wrong with the car.
A.
out
B.
off
C.
of
D.
to
【简答题】Even the mechanic couldn’ t figure ______ what had gone wrong with the car.
【单选题】Even the mechanic couldn’t figure ______ what had gone wrong with the car.
A.
out
B.
at
C.
in
D.
to
【单选题】Even the mechanic couldn’t figure ______ what had gone wrong with the car.
A.
away
B.
off
C.
on
D.
out
【单选题】对上颌第一磨牙牙合面形态的描述哪个是错误的:
A.
牙合面轮廓呈斜方形
B.
近中边缘嵴短于远中边缘嵴
C.
近颊合角及远舌合角是锐角
D.
近中舌尖三角嵴与远中颊尖三角嵴连成斜嵴
E.
近中窝大于远中窝
【单选题】Even the mechanic couldn't figure ________ what had gone wrong with the car.
A.
about
B.
with
C.
out
D.
down
【简答题】Unsatisfiedwith the payment, he took the job just to got some work experience. A. though was he B, though he wasC. he was though D. was he though
【简答题】设函数 且 存在,则a=____.
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