再生注氯量低于()kg/h大于()秒,注氯系统停。
参考答案:0.84,30
Economy of the world in 2010 was not so good. Many small companies ______.[ ]
A. closed up
B. drew up
C. picked up
D. grew up
旁气流通气监测法的缺点是()
A.不能完全代替术前肺功能检查
B.不能测功能残气量和全肺容量
C.不能测吸(呼)气补量
D.不能测肺活量
E.以上均是