治疗霍乱首选为（）

A.抗菌药物

B.禁食

C.血管活性药

D.补液

E.抗毒素治疗

If a hydraulic pump on a winch accidentally stops while hoisting,the load will stay suspended because（）.

A.a check valve will close that prevents reverse circulation

B.a centrifugal counterweight counteracts the force of gravity

C.the electric pump motor cut out

D.the control lever will move to the stop position