呋塞米属于下列哪类利尿药（）
A．强效利尿药
B．中效利尿药
C．保钾利尿药
D．碳酸酐酶抑制药
E．渗透性利尿药
参考答案：A
She ________ her story at the point where she stopped just now. [ ]
A. took up
B. took down
C. took on
D. took off
节流阀（）
A.控制压力稳定
B.改变油路连续状态
C.控制执行元件工作油液等介质流量
D.可控制速度稳定性要求高的系统
