变质蔬菜中亚硝酸盐含量高,其对人体的主要危害是()。
A.对胃肠道粘膜的刺激
B.有致癌危险性
C.引起溶血
D.抑制食欲
E.引起神经麻痹
参考答案:B
— Do you know our town well?
— Yes, this is the second time that I________here. [ ]
A. come
B. am coming
C. came
D. have come
二批判学派对“大众文化”有何认识?