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