He isn't a policeman, _______? [ ]
A. isn't he
B. don't he
C. is he
D. does he
答案:C
在横线里填上“>”、“<”或“=”.
5.82×0.85______5.82 12.78÷1.01______12.78.
生活中的下列物质,属于纯净物的是( )
A.豆浆
B.酱油
C.今世缘大曲酒
D.水