Bill hasn't changed his mind, _____? [ ]
A. does he
B. is he
C. has he
D. did he
答案:C
检查肌张力时要求()
A.肌肉无萎缩
B.肌肉无瘫痪
C.肌肉放松
D.神志清楚
E.无感觉障碍
机床床身的毛坯大都是()而成。
A.铸造
B.锻造
C.焊接
D.压力加工