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14号换库15考,V呵呵,分手失败。
[作文]
讲一个药店A看到另一个药店B生意好,A的领导就想在B的三家店旁边开店,抢B的longtime customer。并且说想让客户知道 B在价格上无法与A抗衡,因为A有实力一次性从supplier那购买大量的货从而拿到便宜的价格。
构筑思路:
1. 价格低 != 客户买账
2. 有实力买多货 != 客户认为你好,可能客户会认为你存货久,质量不好etc
[阅读]
考了:
- JJ1 外包
- JJ13 火星上的水
- 还有一个是生物diversity,生词多,不是JJ2:
十五、动物隔离区
文章1: 建立一个个生态保护区并不能避免珍稀动物的濒临灭绝, 因为这些生态区是一个个隔离开来的,之间没有联系.要解决这个问题,有一种方案叫“STEPPING STONE”,俗称“CORRIDOR”,这样可以把分开的生态区连接起来, 但是corridor浪费资源,是否可行有待科学考证. 目前,一些研究发现corridor造成老鼠和蚂蚁的expansion. 记得一题: corridor会造成什么影响,我选可能会危机其他物种。
目前的动物保护区太孤立,反而产生local 灭绝。两种较流行的办法:step stone and corridor. Step stone 适于小批量动物之间的沟通。Corridor 受争议。反对者认为钱花的太多。但corridor 的植被本来就管理得很好 …(不是很明白的一段话)。结论:corridor的最终目标是否实现仍无直接证据证明。
Wiki:Wildlife corridor
A wildlife corridor, habitat corridor, or green corridor[1] is an area of habitat connecting wildlife populations separated by human activities or structures (such as roads, development, or logging). This allows an exchange of individuals between populations, which may help prevent the negative effects of inbreeding and reduced genetic diversity (via genetic drift) that often occur within isolated populations. Corridors may also help facilitate the re-establishment of populations that have been reduced or eliminated due to random events (such as fires or disease).
This may potentially moderate some of the worst effects of habitat fragmentation,[2] wherein urbanization can split up habitat areas, causing animals to lose both their natural habitat and the ability to move between regions to use all of the resources they need to survive. Habitat fragmentation due to human development is an ever-increasing threat to biodiversity, and habitat corridors are a possible mitigation.
--顺便问一下大家取消成绩后怎么买ESR呢?看到有同学说GMAC会发email,请问是多久之后发呢? |
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