悬灸可分为（）
A.雀啄灸
B.回旋灸
C.实按灸
D.艾条灸
E.温和灸
参考答案：A, B, E
— ______________ it often rain in spring?
— Yes, it ______________. [ ]
A. Does; does
B. Did; did
C. Does; do
D. Do; do
某一泵系统管道沿程阻力为1.5米水柱，局部阻力损失为沿程阻力的10%，净扬程为25米水柱，求该泵总扬程？
