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【单选题】
双代号网络计划中,当某工作之后有虚工作时,则该工作的自由时差为( )A.
该工作的波形线的水平长度
B.
本工作与紧后工作间波形线水平长度和最大值
C.
本工作与紧后工作间波形线水平长度和最小值
D.
后续所有线路波形线中水平长度和最小值
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举一反三
【简答题】Her work is often very hard and she gets very tired. The work is _____. A. wonderful B. splendid C. tedious D. magnificent
【简答题】A．For hard B．As hard C．Very hard D．As hard as
【单选题】In this school, ______ students work very hard, ______ they are very happy.
A.
although, /
B.
although, but
C.
/, although
D.
but, although
【单选题】It was very hard for my parents to pay ny education fees,_________ were very high in this country.
A.
what
B.
that
C.
which
D.
as
【简答题】The teacher is very strict and makes him ___________ (work) very hard.
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