请教nn一道PREP里的题，要考了！此题什么意思呢？。。

wxq19881113 · 发表于 2010-4-26 22:33:54

[attachimg=1209,411]77026[/attachimg]

wxq19881113 · 发表于 2010-4-26 22:34:23

正确答案是选C哈~~请NN们解答！

Jasonhere · 发表于 2010-4-26 22:40:06

4 serving/cup, how many cup next time?
(1) how many serving last time? -------------------------------------------------insufficient
(2) 6 4=24 serving last time------------------------------------------------------ insufficient
(1)(2) this time serving=24 =12 =3cup------------------------------ sufficient

wxq19881113 · 发表于 2010-4-26 22:40:20

还有一题。。最弄不清楚这种题了！！唉唉，，[attachimg=717,391]77029[/attachimg]

wxq19881113 · 发表于 2010-4-26 22:41:08

不好意思哦。。麻烦用中文行么。。

Jasonhere · 发表于 2010-4-26 22:42:04

p^2-n^2 =(p+n)(p-n)
(1) p+n=5a+1 ----------------------------------------------------------------------insufficient
(2) p-n=3b+1 -----------------------------------------------------------------------insufficient
(1)(2)(p+n)(p-n)=(5a+1)(3b+1)=15ab+5a+3b+1 ---------------------------insufficient

wxq19881113 · 发表于 2010-4-26 22:42:29

4 serving/cup, how many cup next time?
(1) how many serving last time? -------------------------------------------------insufficient
(2) 6 4=24 serving last time------------------------------------------------------ insufficient
(1)(2) this time serving=24 =12 =3cup------------------------------ sufficient

-- by 会员 Jasonhere (2010/4/26 22:40:06)

GG能用中文么？？？。。俺有点没看懂也。。= =

wxq19881113 · 发表于 2010-4-26 22:43:14

懂了！谢谢~呵呵

请教nn一道PREP里的题，要考了！此题什么意思呢？。。

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