米糠油事件由哪种环境污染物引起()。
A.甲醛
B.甲苯
C.多氯联苯
D.异氰酸甲酯
E.以上都不是
参考答案:C
— Sorry, I ________ you just now.
— It doesn't matter. [ ]
A. can't recognize
B. don't recognize
C. didn't recognize
D. haven't recognized
从问世时间上看,《桃花扇》相比《长生殿》至少提前了10年。