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【判断题】
《游园》一折中演员的行当有巾生、六旦A.
正确
B.
错误
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【单选题】A bicyle or a motorcycle is built on the same _________, though th force that moves them is different.
A.
principal
B.
principle
【单选题】The force exerted by a propeller which tends to throw the stern right or left is called（）.
A.
slip
B.
sidewise force
C.
rotational force
D.
thrust
【单选题】So involved with computer games________that teachers at summer computer camps often have to force them to break for sports and music.
A.
became the children
B.
become the children
C.
had the children become
D.
do the children become
【单选题】Sidewise force of the propeller tends to throw a vessel’s stern to the right or left，depending on rotation. This force is caused by（）.
A.
back current from the rudder
B.
greater pressure on the right or left side of the propeller，depending on rotation
C.
lower pressure on the right or left side of the propeller，depending on rotation
D.
torque from the velocity and angle at which the surrounding water impinges upon the propeller blades
【单选题】What does the author think of the new immigrants?
A.
They will be a dynamic work force in the U. S.
B.
They can do just as well as their predecessors.
C.
They will be very disappointed on the new land.
D.
They may find it hard to fit into the mainstream.
【简答题】His recommendation that Air Force (investigate) ______ the UFO sighting was approved by the commission.
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