He's never late for class, ________? [ ]
A. is he
B. has he
C. isn't he
D. hasn't he
答案:A
普通支票只能用于转账不能用于支取现金。()
下述哪项是张力性气胸的临床表现()
A.胸壁反常呼吸运动
B.胸部广泛皮下气肿
C.气管向健侧移位
D.极度呼吸困难
E.伤侧叩诊呈鼓音