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本课程起止时间为:2020-03-01到2020-05-30
本篇答案更新状态:已完结
1、 问题:Which one of these is not British Newspaper?
选项：
A: The Times 《泰晤士报》
B:The Wall Street Journal 《华尔街日报》
C:Oxford Gazette 《牛津公报》
D: The Guardian 《卫报》
答案: 【The Wall Street Journal 《华尔街日报》】 点我阅读全文
本答案对应课程为:点我自动跳转查看
本课程起止时间为:2020-02-21到2020-06-30
本篇答案更新状态:已完结
1、 问题:1) This chemical is used in lots of industrial processes, including water purification, and to separate DNA molecules in experiments. (Para. 2) 2) Acrylamide is made by something called the Maillard reaction, which browns cooked foods and gives them their pleasing flavor. (Para. 3) 3) The chemical can also be present in breakfast cereals, biscuits and coffee. (Para. 3) 4) Animal studies clearly show that acrylamide causes all sorts of cancers, but it’s hard to relate this to us. (Para. 4) 5) Although evidence from animal studies has shown that acrylamide in food could be linked to cancer, this link isn’t clear and consistent in humans. 点我阅读全文
经基本运算得到离散信号
，其中不需要的基本运算为 。