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【简答题】
晶体三极的三个工作区分别为________工作区、________工作________工作区。在放大电路中,晶体三极管通常工作在_________工作区。
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举一反三
【单选题】A compressor should never be stopped _____.
A.
without first cooling it
B.
without first heating it
C.
without first unloading it
D.
without first loading it
【单选题】Without a passport， leaving the country is __________
A.
in question
B.
without question
C.
out of the question
D.
out of question
【单选题】At midnight the enemy attacked _________.
A.
without warning
B.
without notice
C.
without permission
D.
A or B
【单选题】Ted made up has mind soon and accepted the invitation ____ .
A.
without hesitation
B.
without doubt
C.
without understanding
D.
without exception
【简答题】二极管加反向电压,反向电流值很小且基本不变,称为□□□□电流。
【简答题】Without what cannot people understand and translate legal documents? Without___________ of the legal world.
【单选题】Jack came to the party_______．
A.
without being invited
B.
without inviting
C.
without invited
D.
without a invitation
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