坏死组织较多的创面禁忌采用（）。
A.包扎疗法
B.暴露疗法
C.开放疗法
D.湿敷疗法
E.浸泡疗法
参考答案：D
11．My father stayed in Japan only a few months, _____he went through a series of hardship.
A．during which time
B．in time of which
C．where
D．Whenever
掘进机司机离开操作台时，必须断开电气控制开关和掘进机上的隔离开关。（）
