Hearing the interesting story, all the people present_______.

A．burst into laughing

B．burst into laughter

C．burst out laugh

D．burst out laughter

毛果芸香碱的作用，下述哪项是错的

A．滴入眼后可引起瞳孔缩小

B．前房角间隙扩大

C．滴入眼后可引起瞳孔散大

D．滴入眼后可引起近视

E．是M受体的激动剂