艾滋病的病原学特点是()
A.对紫外线敏感
B.耐热
C.其基因组有两条正链RNA
D.分HIV-1、HIV-2、HIV-3三型
E.单链RNA病毒
参考答案:C, E
I think grammar is a great way learn a language.[ ]
A. study, for
B. learns, of
C. studying, to