Astronomer: Observations of the Shoemaker-Levi comet on its collision course with Jupiter showed that the comet broke into fragments before entering Jupiter's atmosphere in 1994, but they did not show how big those fragments were. In hopes of gaining some indication of the fragments' size, astronomers studied spectrographic analyses of Jupiter's outer atmosphere. These analyses revealed unprecedented traces of sulfur after the fragments' entry. The fragments themselves almost certainly contained no sulfur, but many astronomers believe that the cloud layer below Jupiter's outer atmosphere does contain sulfur. Since sulfur would have seeped into the outer atmosphere if comet fragments had penetrated this cloud layer, it is likely that some of the fragments were at least large enough to have passed through Jupiter's outer atmosphere without being burned up.作者: clairexuan9 时间: 2012-3-10 04:01
不是这道，我尽量回忆一下，就是第一个提出了一个方案跟sales有关系，然后critisim说这个不好，然后紧接着又反驳那个critisim,说这个地方是3%的tax,但是neibouring是6%tax,所以会increase sales. 总之就是第2个bold face是support原结论的。大概就是这样的吧...作者: clairexuan9 时间: 2012-3-10 06:12
数学想起来几道，就是说有一个什么公司， 1.范围是在500多million到7billion间，然后就是就9个这样的东西，也就是9*500到9*7billion, 然后问最小的范围是几billion,给了 1billion=10^9， 题目不难，就是考场上换算好烦！