汽提塔的作用是从塔顶汽提出加氢油中的（）和H2S，使塔底汽油的蒸汽压和腐蚀满足要求。
参考答案：不凝气
—How clean the room is today!
—Oh, yes! Who _____ it?[ ]
A. is cleaning
B. will clean
C. has cleaned
D. had cleaned
可引起低氯血症的是（）
A.尿路梗阻
B.心力衰竭
C.呼吸性碱中毒
D.肾上腺皮质功能减退症
E.急性肾衰竭
