I can achieve a good result only by getting a good test mark.
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The world is so big, I wouldlike to step out and have a look. Victoria is a student of International Business. She likes travelling around the world.The first thing she should do is to exchange currency. Why?“世界那么大,我想去看看”。小薇是国际贸易专业的学生,喜欢周游世界。出国首要之事是换外汇,为什么?
食品生物性污染以()污染范围最广,危害最大。
A. 寄生虫
B. 微生物
C. 昆虫
D. 病毒
烧焦的鱼上含有的极强致癌物是( )
A. 苯并芘
B. 黄曲霉毒素
C. 亚硝胺
D. 杂环胺