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【单选题】
T4噬菌体属于:A.
螺旋对称
B.
立方体对称
C.
复合对称
D.
不对称
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【单选题】听力原文：(A) The flight attendants are getting off the plane. (B) The pie ought to be ready to take out. (C) The pilots are preparing to take off. (D) The musicians are tuning their instruments.
A.
B.
C.
【单选题】The flight attendants are preparing dinner in the ____.
A.
galley
B.
air
C.
craft
D.
plate
【单选题】The flight attendants helped people get into position and comforted those who were already hysterical. Question: What does this sentence indicate?
A.
The passengers were so frightened that they could not control themselves.
B.
The passengers were so calm that they could control themselves.
C.
The flight attendants could not provide a positin for every passenger.
D.
The passengers told flight attendants that their seats were not comfortable.
【简答题】Flight attendants work on a ____.
【单选题】听力原文： Flight attendants with Mexico's main airline, Aeromexico, have gone on strike to demand higher wages. The work stoppage, which took effect early Friday, is expected to affect up to 30,000 passen...
A.
13,000.
B.
30,000.
C.
1,500.
D.
5,000.
【单选题】Flight attendants usually need to arrive at the airport ______ before their flight leaves.
A.
much
B.
very
C.
well
D.
largely
【单选题】听力原文： Flight attendants with Mexico’s main airline, Aeromexieo, have gone on strike to demand higher wages. The work stoppage, which took effect early Friday, is expected to affect up to 30,000 passen...
A.
13,000.
B.
30,000.
C.
1,500.
D.
5,000.
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