肾综合征出血热休克期,下列哪种药物不宜首先使用()
A.血管活性药物
B.平衡盐
C.低分子右旋醣酐
D.碳酸氨钠
E.高渗葡萄糖
参考答案:A
The hotel porter ______ anybody who wasn't wearing a collar and tie.
A.turned to
B.turned off
C.turned away
D.turned up
摩擦带传动按带的剖面形状可分为V带传动、平带传动 、圆带传动等类型。