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【单选题】
三相半波可控整流电路电阻负载的触发延迟角a移相范围是(A.
0°-90 °
B.
0 ° ~100 °
C.
0 ° -120 °
D.
0 ° ~150 °
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举一反三
【单选题】It is suggested that such a law ______.
A.
needn’t be passed
B.
mustn’t be passed
C.
not be passed
D.
will be passed
【单选题】Which of the following states is the first state that passed the compulsory education law in the United States?
A.
Massachusetts.
B.
Texas.
C.
Iowa.
D.
California.
【单选题】The law ,which was passed for the benefit of public ,forbade people to smoke in public places .
A.
/ ;the
B.
the ; the
C.
the . /
D.
/ ; /
【单选题】However, the new law, once passed, will ______ the Bridlington agreement illegal by giving workers the right to join unions of their choice.
A.
cancel
B.
render
C.
eliminate
D.
convert
【单选题】(Not having passed) the law exam, (the state) refused (to issue him) a license (to practice).
A.
Not having passed
B.
the state
C.
to issue him
D.
to practice
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