If you don't know a word, you can _____ it _____ in a dictionary. [ ]

A. look...up

B. look...down

C. look...over

D. look...out

易逆性抗胆碱酯酶药（）

A.阿托品

B.东莨菪碱

C.毒扁豆碱

D.有机磷酸酯类

E.碘解磷定