在网络计划中，某项工作的结束节点为关键节点时，其总时差与局部时差的关系，要么相等，要么都等于零。 ()
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A．The train will be overheated when it arrives.B．It is too hot to wait any more.C．They
A. The train will be overheated when it arrives.
B. It is too hot to wait any more.
C. They are going to be late in their plan again.
D. They will have to schedule another dinner.
A．Ride more safely in the future.B．Go to see a doctor.C．Needn't worry since it is not
A. Ride more safely in the future.
B. Go to see a doctor.
C. Needn't worry since it is not serious.
D. Buy a new bike.
A．The journalist is ringing a bell.B．His name sounds melodic.C．John Smith is ringing t
A. The journalist is ringing a bell.
B. His name sounds melodic.
C. John Smith is ringing the bell now.
D. The name sounds familiar.
A．It is more convenient to live in the hotel if you stay in the U.S.B．It can save much
A. It is more convenient to live in the hotel if you stay in the U.S.
B. It can save much money to live away from the city.
C. You can rent a place for some time if you want to save money.
D. Most people go visiting houses or apartments on Sunday morning.
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