肺炎患儿宜采取的体位是
A．左侧卧位
B．平卧位
C．头部抬高20～30cm，下肢抬高1O～20cm
D．去枕仰卧位
E．半卧位
参考答案：E
I had just stepped out of the bathroom and was busy drying myself with a towel ________ I heard
the steps.[ ]
A. while
B. when
C. since
D. after
数据库恢复是将数据库从 【4】 状态恢复到某一已知的正确状态。
