去除植物油中黄曲霉毒素B1及3，4－苯并芘的共同措施是（）。
A.加热
B.用氨处理
C.活性炭吸附
D.提取
E.日晒
参考答案：C
The students all stopped _____ when the teacher came into the classroom.[ ]
A. talk
B. to talk
C. talking
D. talked
理性刚塑性材料
