Julie _____ from England, and her pen friends _____ from the USA.    [ ]

A. come; is

B. is; comes

C. comes; is

D. comes; are

氨羧螯合剂（依地酸钙钠）和巯基螯合剂用于哪项中毒抢救治疗（）

A.有机磷农药中毒

B.氰化物中毒

C.亚硝酸盐中毒

D.重金属中毒

E.急性CO中毒