【单选题】A bicyle or a motorcycle is built on the same _________, though th force that moves them is different.
【单选题】The force exerted by a propeller which tends to throw the stern right or left is called().
【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.
C.
had the children become
D.
do the children become
【判断题】在绘制男性臀部的时候因为考虑到肌肉因素,绘制的难度会比女性要大。大殿筋、中殿肌的线和浮出的臀窝是明显的特征。()
【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.