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【多选题】
下列有关工程网络计划叙述正确的是（ ）。A.
总时差为零的工作为关键工作
B.
关键线路上允许有虚工作和波形线的存在
C.
网络计划中以终点节点为完成节点的工作，自由时差与总时差相等
D.
自由时差为零时，总时差必为零
E.
除了以网络计划终点为完成节点的工作，其他工作的最迟完成时间应等于其紧后工作最迟开始时间的最小值
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【简答题】When the normal wholesale price of the imports prevailing at the place of purchase cannot be ascertained by the Customs，the duty-paying value shall be assessed on the basis of the normal domestic whol...
【单选题】Solid green arrows on the main body of a pilot chart indicate ______.
A.
prevailing wind directions
B.
prevailing ocean current directions
C.
probable surface current flow
D.
shortest great circle routes
【单选题】The French Geophysicists' study is different from currently prevailing theories in ______.
A.
its identification of the origin of the earth's magnetic field
B.
the way the earth's magnetic intensity is measured
C.
its explanation of the shift in the earth's polarity
D.
the way the earth's fluctuation rhythm is defined
【单选题】The French geophysicists' study is different from currently prevailing theories in ______.
A.
its identification of the origin of the earth's magnetic field
B.
the way the earth's magnetic intensity is measured
C.
its explanation of the shift in the earth's polarity
D.
the way the earth's fluctuation rhythm is defined
【简答题】The theory of class currently prevailing in the West is ______ based on what Max Weber, a German sociologist, proposed. A：fairly B：kindly C：largely D：greatly
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