A．be made fromB．consist ofC．consist inD．be consisted of
A. be made from
B. consist of
C. consist in
D. be consisted of
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真空系统在压力试验合格后，联动试运转前，应以设计压力进行真空度试验，时间为24小时，以增压率不大于()为合格。
A. 4%
B. 5%
C. 6%
D. 7%
Which of the following would most seriously undermine the validity of the model of El Nino
A. During some years El Nino extends significantly farther along the coasts of Ecuador and Peru than during other years.
B. During periods of unusually cool temperature along the eastern Pacific, an El Nino is much colder than normal.
C. The variations in the time it takes Rossby waves to cross the Pacific depend on the power of the winds that the waves encounter.
D. The western boundary of the Pacific basin is so irregular that it hinders most coastal Kelvin waves from heading eastward.
A．The movie is had.B．The movie is exciting.C．She wants to see it again.D．She should ha
A. The movie is had.
B. The movie is exciting.
C. She wants to see it again.
D. She should have watched it on TV.
某工程时标网络图如下，说法正确的是()。
A. 工作A的LF为3
B. 工作C的TF为1
C. 工作E的TF为2
D. 工作C的FF为3
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