T细胞按其表面抗原分为两个主要亚群,分别是()
A.CD4、CD8
B.CD4、CD6
C.CD6、CD8
D.CD3、CD8
E.CD3、CD4
参考答案:A
People don't usually like , so we have to be careful how we give them some suggestions.[ ]
A. criticize
B. to be criticized
C. to criticize
D. criticizing
下列选项中,( )是建设项目财务管理的根本目标和中心环节。
A.提高投资效益
B.提高项目质量
C.防御投资风险
D.提高投资收益