1 大於1的正整数n，给个式子(n^2-1)!/(n^2-4)![之後好像是说它们有多项式]，然後就问 the dgree of the polynomial? 选项有0 1 3 6 9(大概是，待证实) (这题在说什麽?请解释一下.........) 25、DS: 两个数 大数的1/3比小数的5倍还多 问小数是不是less than 4 ? (1)大数比50大 (2)大数比65小 (1)若大数代54,小数<4 但若代63则小数非<4..........不充分 (2)同理....不充分 (1)+(2)代63则小数非小於4...... 以此题问法,答案是充分or不充分?? JJ给答案若A,B为整数-充分,选C；若为实数- 不充分,选 E。 PP: Some waters was remove from each of 6 tanks, if the stander deviation at the begining was 10g,what was the stander deviation at the end? 1)each tank,at the begining 30%water was remove 2)mean at the end was 63g (看不懂解答...(1)为何要10^2 ?) 请大家帮帮忙了,快考试啦~~感谢! --

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