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[Issue Essay]

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题目:

Analytical!

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提问:

Most of the world's supply of uranium currently comes from mines. It is possible to extract uranium from seawater, but the cost of doing so is greater than the price that uranium fetches on the world market. Therefore, until the cost of extracting uranium from seawater can somehow be reduced, this method of obtaining uranium is unlikely to be commercially viable. Which of the following would it be most useful to determine in evaluating the argument? A.Whether the uranium in deposits on land is rapidly being depleted B.Whether most uranium is used near where it is mined C.Whether there are any technological advances that show promise of reducing the cost of extracting uranium from seawater D.Whether the total amount of uranium in seawater is significantly greater than the total amount of uranium on land E.Whether uranium can be extracted from freshwater at a cost similar to the cost of extracting it from seawater

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解答: sysadmin

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25)有三个stack用来放7个file,7个file中有2个是3m高;有2个是5m高;还有3个是4m高,那么这三个stack中最高的一个stack的最小高度是多少? 10 题目不太懂 求may老师

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解答: 徐小梅老师

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提问:

求may老师解答

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提问:

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解答: 徐小梅老师

提问:

求may老师

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解答: 徐小梅老师

提问:

老师为什么9k加8可以变成9k加3咧?还有前面(1)那个列出来的式子不是应该3k加1再加1乘以y吗?

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解答: 徐小梅老师

提问:

老师这道题126除以21是为了干嘛的?拆分最小公倍数嘛?那拆分的形式里面也没有6啊?还有后面的63是哪里来的?是拆分的那个最小公倍数嘛? 如果在考试中我不能很快速的算出来类似126这样的大数的最小公倍数怎么办?有什么快速算出来的办法吗?谢谢!

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解答: 徐小梅老师

提问:

求may老师

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提问:

已知一个五边形有4个角相等,剩余的第5个角比其他4个角小,问这4个角一样的角的度数范围? 108-135 求may老师解答

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解答: 徐小梅老师

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