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【单选题】
在双代号网络计划中,M工作的ES=12,LS=15,D=6,M有三项紧后工作,他们的最早开始时间分别为21,24,28,则M工作的自由时差为( )A.
1
B.
3
C.
4
D.
8
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举一反三
【单选题】Mike failed to finish his homework on time, so he tried to avoid _______ his teacher.
A.
meet
B.
to meet
C.
to meeting
D.
meeting
【简答题】A．He made a sudden turn. B．He tried to avoid hitting the truck. C．He was pursued by the running dog. D．A girl riding a bike crashed into his car.
【单选题】He tried to avoid ______ my questions in class.
A.
to answer
B.
answering
C.
having answered
D.
to have answered
【简答题】如图，已知正四棱锥P-ABCD的底边长为6、侧棱长为5.求正四棱锥P-ABCD的体积和侧面积． A
【单选题】He tried to avoid________my questions in class.
A.
to answer
B.
answering
C.
to have answered
D.
having answered
【单选题】He tried to avoid the barrier to his carrying out the plan.
A.
root
B.
obstacle
C.
danger
D.
advantage
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