下列哪种畸形在痉挛型大脑瘫痪者中最少见
A.跟腱挛缩
B.足内翻
C.剪刀式步态
D.髋外展挛缩
E.髋屈曲挛缩
参考答案：D
A．(A) I know many business people at the Beachside Hotel.
B．(B) The Beachside is the only favorite hotel for many business people.
C．(C) Many business people like to hold conferences in the Beachside Hotel.
D．(D) Many business people provide the best conference facilities for the Beachside.
在同一周期中，同时有三个交流电势，且这三个交流电势的幅值相等，频率相同，彼此之间的相位差相等，各为90°，即三相对称交流电势，叫做三相交流电。( )
