病人手术区消毒时,哪项不正确()
A.由手术区中心部向四周涂擦
B.手术区外周向瘘口周围涂擦
C.由手术区上方涂向下方
D.由手术区一侧涂向另一侧
E.无需按一定顺序
参考答案:E
He's got himself into a dangerous situation ____ he is likely to lose control over the plane. [ ]
A. where
B. which
C. what
D. why
期权市场上,投资者可以通过卖出平仓来()
A.增加权利仓头寸
B.减少权利仓头寸
C.增加义务仓头寸
D.减少义务仓头寸