【单选题】Seeing the happy _____ of children playing in the park, I’m full of joy and confidence in the future of our country.
【简答题】A.Children are willing to accept the real violence in society. B.Children will become more and more kind. C.Children will not accept the violence in society. D.Children think they are just imaginary.
【简答题】Children who are over-protected by their parents maybecome _____. A. hurt B. spoiled C.damaged D. harmed
【单选题】For the root of B_tree of order m,the minimal number of its children is
【单选题】通过测量区的液柱断裂成一连串均匀液滴的原因是在( )
C.
在压电晶体上加上了频率为 30kHz 的信号
D.
在光电倍增管上加上了频率为 30kHz 的信号