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[Issue Essay]

试题详情

题目:

Analytical!

选项:

答案:

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

解答:

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解答: sysadmin

提问:

第8题的思路是以BC为底,从F向BC做垂线,跟BC交点H,FH为三角形FBC的高。然后三角形BFH跟三角形BDC相似,h:30=BF:BD,但是BF长度未知,望老师解答。

解答:

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解答: 徐小梅老师

提问:

求问此题:DS:一个矩形地毯问面积是否大于160? 条件1:对角线>21 条件2:至少有一条边大于8 谢谢!

解答:

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解答: 徐小梅老师

提问:

求问此题的详细解法。谢谢老师~!

解答:

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解答: 徐小梅老师

提问:


解答:

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阅读232817
解答: 徐小梅老师

提问:

下面那个圆的半径我求不出来。请老师答疑!谢谢!

解答:

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阅读232769
解答: 徐小梅老师

提问:

请问这道题是选E吗(答案我给忘了)?一个数N是否能被4!的三次方整除 1)这个数能被6!的二次方整除 2)这个数能被9!整除

解答:

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阅读233588
解答: 徐小梅老师

提问:

5^500 + 5^501 + 5^502 + 5^503 最大的质因子是多少?求具体解法!谢谢老师!

解答:

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阅读233929
解答: 徐小梅老师

提问:

求问此题:一个正方体,选三条不在同一顶点的棱涂成红色,问有几种方法?我的计算过程是C(12,1)*C(7,1)*C(2,1)=168.不知道思路正确与否,请老师答疑解惑。谢谢!

解答:

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阅读234152
解答: 徐小梅老师

提问:

此题求解:DS:3个数,问中位数是否大于平均数? 条件1:最大数和最小数之和大于中位数; 条件2:最大数=450+平均数,最小数=平均数-150 谢谢!

解答:

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解答: ken@boost.org.cn老师

提问:

一个正方体,选三条不在同一顶点的棱涂成q红色,问有几种方法? 请may回答 我算的是( C3 12 )-8

解答:

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解答: 徐小梅老师

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