10.15换库放狗

曼神是我本命喵

bzy! 发表于 2018-10-16 10:15
能回忆一些原文关键词吗？

life alternative, organsim, microbes, bacteria, life began more than once on earth
只记得这些了，可能不太准确

billyisfragile!

曼神是我本命喵 发表于 2018-10-16 14:22
life alternative, organsim, microbes, bacteria, life began more than once on earth
只记得这些了， ...

After all, many astrobiologists now think that given the right conditions any sufficiently complex molecular soup has a good chance of generating life if it simmers long enough. If that’s so, it seems plausible that life may have arisen on Earth not once, but several times. New origins of life are unlikely today, because existing life would gobble up any aggregations of prebiotic molecules before they could edge over the threshold. However, opportunities for the origin of life may well have existed for long periods on the early Earth. Some of these origins may have been dead ends, out-competed by other life forms – but others could still be living among us, unnoticed.

我的芋头呢

请问数学第3题怎么得到5的？

王圐圙

PS：x^2+y^2=36,x-y=0，求 xy？ 构筑答案：构筑选了-18.
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求问为什么是-18？

Moonsu

感谢！！太详细了

zj2017

王圐圙 发表于 2018-10-18 16:05
PS：x^2+y^2=36,x-y=0，求 xy？ 构筑答案：构筑选了-18.
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同意！               

woyaoqujq

请问楼主，这次库里的s c难吗？是重点考语义，语法很少能排除是吗

没头脑与不高兴

感谢分享！               

gege1111

楼主楼主 请教一个数学题

数学
1.p,x,y是正整数，p^（xy）的unit digit?
(1)p^(x)的unit digit是1
(2)p^(y)的unit digit是1

我的思路：
条件一，可知P有可能为1，3，7 （3^4, 7^4 不知道（y）的值...... 不充分）
条件二，（3^8,7^8.... 不知道（x）的值 不充分）
条件一加条件二，充分。

请问我的思路是哪里错了呀，谢谢！！