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【简答题】
若 2+mi 1+ 2 i =- 2 i （i为虚数单位），则实数m=______．
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举一反三
【单选题】Mark was a student at this university from 1999 to 2003, he studied very hard and was made Chairman of the Students’ Union. [ ]
A.
during which time
B.
for which time
C.
during whose time
D.
by that time
【单选题】Contrary to the opinion of the public, the chairman decided to appoint _______ he thought was equal to the job.
A.
who
B.
whomever
C.
whom
D.
whoever
【多选题】混凝土重力坝安全监测设计应注意下列( )事项。
A.
配合坝体构造设计，合理布置观测廊道和观测站
B.
为监测设施提供良好的交通、照明、防潮、防风、排水、保温及保安条件
C.
监测设施的埋设安装，应减少施工干扰。仪器和电缆应有可靠的保护措施
D.
根据理论计算或模型试验成果，对主要监测项目宜提出预计的测值变化范围。1级和2级重力坝重点监测坝段的位移值和扬压力值，宜提出警戒值
【单选题】The chairman says he needs an assistant that he can ______ to take care of problems that may occur in his absence.
A.
count on
B.
resort to
C.
look up to
D.
seek after
【单选题】___ surprised me most was ____ he was too late for the important meeting, for he was chairman of it.
A.
What; why
B.
That; how
C.
What; how
D.
That; why
【单选题】Why did Hill lose his job? 查看材料
A.
He got angry with his boss．
B.
He always got to work late．
C.
He was frequently sick and absent from work．
D.
He made a mistake in the accounting．
【简答题】Why did Hill lose his job?
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