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[Issue Essay]

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题目:

Analytical!

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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

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解答: sysadmin

提问:

The profit from the sale of a certain appliance increases, though not proportionally, with the number of units sold. Did the profit exceed $4 million on sales of 380,000 units? (1)The profit exceeded $2 million on sales of 200,000 units. (2)The profit exceeded $5 million on sales of 350,000 units. 1不够,2 怎么看? 谢谢

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解答: sysadmin老师

提问:

A report consisting of 2,600 words is divided into 23 paragraphs. A 2-paragraph preface is then added to the report. Is the average (arithmetic mean) number of words per paragraph for all 25 paragraphs less than 120 ? (1) Each paragraph of the preface has more than 100 words. (2) Each paragraph of the preface has fewer than 150 words.

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解答: sysadmin老师

提问:

PS :给树标号,范围是201到740 某一品种的树的百位一定是4、5、6、7,个位一定是2、3、4、5, 求随便抽一棵树不是这个特定品种的树的概率?

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解答: sysadmin老师

提问:

DS:is|x-y|>|x-z|? 条件1:是y的绝对值大于z的绝对值 。 条件2:是x<0。

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解答: sysadmin老师

提问:

1 3 2 B 3 4 4 10 A 2 8 1 第一列是调查的信用卡的拥有数,第二列是对应的人数,如第一行的意思就是三个人每人拥有一张信用卡,问信用卡拥有数的中位数? (1)A=6 (2)B=7

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解答: sysadmin老师

提问:

m*(m+5)*(m+6)的因数可能是哪几个? 3 , 4 , 6

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解答: sysadmin老师

提问:

连续四天股票收盘分别停在了8230,8390,8460,8530(数字可能有出入),第五天收盘多少? (1)这组数的差值是220 (2)8390是这组数的中位数

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解答: sysadmin老师

提问:

三角形ABC,点D在AC上,D不能与AC相交(解释说这句话的意思是BD不能等于BA和BC,是独立的),AB是否等于BC? (1)角BDC=角BCD (2)BD=DC

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解答: sysadmin老师

提问:

有A和B,共n个人(人数已知)他们每个人都可以同意或不同意一件事情,已知A有X人,B有Y人,bothA和B有Z人,求又是B又不同意的人?

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解答: sysadmin老师

提问:

给了两种书数量的比例3:X,求X? (1)数的总数是15 (2)X小于13 讨论说选A,因为比例不能是3:12,必须要是最简形式1:4,可是我觉得3:12可以,3:2也可以,条件1不充分

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解答: sysadmin老师

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