击法可分为拳击法、掌击法、侧击法、指击法、棒击法等
参考答案：错
(2013·皖南八校联考)Singing with Sun Yang，the swimming champion，face to face is an unforgettable moment，________ the little girl always treasures.
A．one
B．this
C．that
D．it
B737-300型飞机电源系统的频率是（）。
A.200Hz
B.300Hz
C.400Hz
D.500Hz
