Would you like to share the room _______ her brother? [ ]
A. with
B. and
C. of
D. on
答案:A
下列物质中,属于纯净物的是( )
A.空气
B.金刚石
C.不锈钢
D.碘酒
属于原核细胞性微生物()
A.病毒
B.细菌
C.真菌
D.毒素
E.原虫