It can be inferred from the passage that only children's parents should______.
A. found a support group for their only children
B. do volunteer work to help their only children
C. let their only children make all the decisions alone
D. set good examples for their only children
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汉译英：“摩擦系数”，正确的翻译为( )。
A. reeaing Point
B. Freeaing Factor
C. Friction Point
D. Friction Factor
汉代的中央官学主要有太学、宫邸学和（）。
A. 国子学
B. 四门学
C. 鸿都门学
D. 画学
They are all very tired, but ______of them would stop to take a rest
A. any
B. some
C. none
D. neither
"There is nothing new under the sun" really implies that
A. a new thing can only be created at the basis of earliest things
B. a new thing is only a tale
C. we can seldom create new things
D. we can hardly see really new things in the world
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