下列调节对象中,对象滞后最大的是()。
A.蒸汽夹套加热器温度
B.管道流量
C.截面积小的贮槽液位
D.截面积大的贮罐液位
参考答案:A
-All the workers went home yesterday Mr Green, why?
-Because he had some extra work to do.
A.except
B.expect
C.besides
D.beside
分娩镇痛首选()
A.0.25%~0.5%普鲁卡因
B.3%~5%普鲁卡因
C.1%~2%丁卡因
D.1%~2%利多卡因
E.0.125%布比卡因