A.3-8滴/min B.5-10滴/min C.10-20滴/min D.10-30滴/min
A.1/3-1/2 B.1/4-1/3 C.1/2-2/3 D.1/2-3/4
A.90-100度 B.100-120度 C.110-180度 D.120-180度