问题
单项选择题
在某工程双代号时标网络计划中,除以终点节点为完成节点的工作外,某工作箭线中的波形线的水平投影长度表示( )。
A.某工作的总时差
B.某工作与其紧前工作之间的时间间隔
C.某工作的持续时间
D.某工作与其紧后工作之间的时间间隔
答案
参考答案:D
在某工程双代号时标网络计划中,除以终点节点为完成节点的工作外,某工作箭线中的波形线的水平投影长度表示( )。
A.某工作的总时差
B.某工作与其紧前工作之间的时间间隔
C.某工作的持续时间
D.某工作与其紧后工作之间的时间间隔
参考答案:D
完形填空。 | ||||
Scientists think that there has been life on Earth for millions of years. However, we haven't found life __1 _ other planets yet. Scientists have discovered many other galaxies in the universe. They are a long way away and their _2_ has travelled for many years to reach us. Scientists have sent _3 of spacecraft to look at other planets in our solar system, and some spacecraft _4_ beyond the solar system. However, no one _5 discovered any life in space yet.
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