That box is ________ than this one.[ ]
A. more heavier
B. heavyer
C. much heavier
答案:C
司莫司汀属于下列哪一类抗肿瘤药物()
A.亚硝基脲类烷化剂
B.氮芥类烷化剂
C.叶酸类抗代谢物
D.嘧啶类抗代谢物
E.嘌呤类抗代谢物
下述哪一个数据库系统属于第一代数据库系统7.
A.Sybase
B.Ingress
C.IMS
D.Object Store