导致手术野污染的因素，应除外
A．手术器械
B．麻醉器械
C．手术人员的手臂
D．感染病灶或腹内空腔脏器
E．患者手术区皮肤
参考答案：B
--- Let’s go fishing if it _____ this weekend .
--- But nobody knows if it ____.
A．is fine , will rain
B．will be fine , rains
C．will be fine , will rain
D．is fine , rains
心理应激
