直吹式制粉系统一般不装设防爆门,管道部件的承压能力按0.3MPa(表压)设计。
参考答案:对
We are glad to receive your telegraphic order of May 6 ______ regret that we can- not supply the goods ______ the end of May.
A. but, by B. and, byC. but, for D. and, for
患者,女性,57岁。支气管扩张病史6年。突然出现大咯血,家属估计咯血量约500ml来院急诊。
护士指导患者应采取的体位是
A.端坐位B.仰卧位、头低足高位C.俯卧位D.健侧卧位,头偏向一侧E.患侧卧位,头偏向一侧