抗肿瘤药卡莫司汀属于（）

A.氮芥类烷化剂

B.亚硝基脲类烷化剂

C.嘧啶类抗代谢物

D.嘌呤类抗代谢物

E.叶酸类抗代谢物

Particular care should be（）in selecting CESs in areas where Ocean Regions overlap.

A.taken

B.take

C.took

D.taked