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【单选题】
一般边界成本用什么来表示。A.
M
B.
S
C.
D
D.
Q
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反馈参考答案：
举一反三
【简答题】电流所经过的路径叫做 ,通常由 、 、 和 四 部分组成。
【简答题】某城市输水管线长4.28km，DN1200钢管，管道埋深约5.0m，管线位于城市主干道路的非机动车道上。采用明开槽方法施工，沟槽土质为回填杂土及粉砂土。受交通条件制约，沟槽土方挖运和吊车下管安排在晚10时～次日早6时进行，项目部办理了管线开挖占路手续。现场施工发生如下事件：
（1）为吊车下管方便，选择夜间时段移动护栏临时占用一条机动车道，受到交通管理部门的处罚。
（2）挖土机开挖沟槽时发现有一...
【单选题】Though rather young in comparison with some others, ______ is the biggest university in England.
A.
The University of Manchester
B.
The University of Wales
C.
The University of Edinburgh
D.
The University of London
【单选题】Unsatisfied ________ with the payment，he took the job just to get some work experience.
A.
though was he
B.
though he was
C.
he was though
D.
was he though
【单选题】Though Jack has failed twice in _____ PE test, he decided to have _____ third try.
A.
the; the
B.
a; the
C.
a; a
D.
the; a
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