He’s lucky enough to have many people ___ him with the work.

A．help

B．to help

C．helped

D．helping

以花、茎、全草类为主的饮片，一般煎药时可浸泡的时间是（）

A.5～10min

B.10～15min

C.20～30min

D.30～60min

E.60min