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【简答题】
如果 GSM 手机的峰值功率为 2W ,那么平均功率为__________________ 。
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举一反三
【单选题】Mary was not in her bedroom yesterday afternoon、 She( )in her classroom.
A.
should have been
B.
must have been
C.
must be
D.
should be
【单选题】It was not until she arrived in class ______ realized she had forgotten her book.
A.
and she
B.
when she
C.
she
D.
that she
【单选题】She found she could not stand any (4) _______in her work, and she envied either her boss or any colleague who was better than her.
A.
failure
B.
envy
C.
criticism
D.
weakness
【多选题】安全目标管理的实施阶段关键是要做好（）等方面的工作。
A.
权限下放、自我管理、自我控制
B.
制定计划、加强组织、严密指挥
C.
监督检查
D.
协调系统
E.
信息交流
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