踝跖屈的主动肌是()
A.股二头肌
B.股四头肌
C.腘绳肌
D.胫骨前肌
E.小腿三头肌
参考答案:E
Peter tried on three jackets, but ____ of them fitted him.
A.all
B.none
C.both
D.neither
下面哪项不是直流变换器的直流变换步骤()
A.逆变换
B.高频变压器
C.低频变压器
D.整流器