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【单选题】
在水利水电工程施工进度计划中，网络计划的时间参数是确定工程计划工期、确定关键路线，作的基础，也是判定非关键工作机动时间和进行计划优化、计划管理的依据。工作的最迟完成时间是指在不影响（）的条件下，一项工作必须完成的最迟时间。A.
紧前工作
B.
紧后工作最早开始时间
C.
紧后工作最早完成时间
D.
工程工期
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举一反三
【单选题】Are there any _____ between the two cities? [ ]
A.
difference
B.
different
C.
differences
D.
difficult
【单选题】The teacher spoke so fast that all the students looked at him with a rather ______ expression.
A.
surprising
B.
vacant
C.
shocking
D.
pleasant
【简答题】电离层由围绕地球的处于不同高度的3个导电层组成的,这3个导电层分别 称为( )、( )、( )。
【单选题】The teacher spoke so fast that it was hard for the students to ______ what he was saying.
A.
take in
B.
take off
C.
take on
D.
take after
【单选题】—What’s the matter? You looked unhappy. —Well, the teacher spoke so quickly and I can __________ understand it.
A.
hardly
B.
nearly
C.
almost
D.
usually
【单选题】The teacher spoke so loudly ______ the students could hear him clearly.
A.
that
B.
so
C.
so that
D.
in order to
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