6/28 放狗

zclydia

V35+Q49

不甘心，还得再努力一次。放狗攒rp。

越毒：碰到一篇jj：三段，P1.恐龙是在T-event中的天外xx撞击而迅速灭绝的，有天外元素&同位素ratio为证（有题，问速死的证据是啥：low level of 天外元素；同位素ratio）P2. 另两个时期的mass extinction不是abrupt的，那时也没发生过什么连续的撞击；（有题，问第二段的作用）P3.这两期的灭绝是因为火山爆发，warming引起水中缺氧，产生了一种什么细菌杀死了其他生物。
另外三篇：第一篇：p1.为什么railway的完成和use之间有gap，没有马上形成new settlement，政府对没有及时产生tax revenue 很失望那！有一些人认为原因有好几个。p2.给原因：农业因为工具落后，天气不好、住的分散等等原因没有起色。后来有了现代化机器、increased prices and carriage等的帮忙变得对外地佬attractiveness，所以后来很多都赶来务农了。只记得好像问了这地方为什么变得attractive了

第二篇（来不及细看，其实很简单的，但是我没绕明白，所以意思可能说反，放出来仅希望能帮到悦毒君考古）：P1.传统认为大星球jupiter等的什么的形成是分两个阶段的：一.好像是什么大的东西分出来的小东西condese 形成了core，二. 通过（转转悠悠？）吸收gas形成envelope。现在有发现几个大星球是彼此互绕orbit啊，这么近的距离它们是怎么通过travel to get gas变得这么大的呢啊？Additionally。。。（这是P2最后一句，全句高亮，考它的作用，无奈我想不起来了，反正也是一个question prevailing 理论的点，貌似有提到什么离得那么近，好烫的！怎么还能形成envelope呢？——Furthermore, it is questionable whether a protoplanet in a closeorbit could attract enough ambient gas to provide the massive envelope of aJupiter-like planet. One reason is simple geometry: an object in a tight orbittravels through a smaller volume of space than one in a large orbit does. Also,the gas disk is hotter close to the star and hence less likely to condense ontoa protoplanetary 就是这一句的总结，感谢楼下分享）。P3.给出解释。提到两个mechanism：其中一个是被卷进太阳系附近的flow of gas被弹出来的；还有一个是mechanism of scattering导致有的离的更近有的更远了——
The third mechanism is the scattering of large planets that either formed in or moved into orbits too close to one another for long-term stability. In this process, the outcomes would be quite unpredictable but generally would yield very eccentric orbits for both planets. In some fortuitous cases, one of the scattered planets would move to an eccentric orbit that would come so near the star at its closest approach that tidal friction would eventually circularize its orbit; the other planet, meanwhile, would be scattered to a distant eccentric orbit.（最后两句关于第二个mechanism就是这段话的总结）

最后一篇（很短的两段，完全掉进低分库了，当时就想哭了，没时间细看，但是觉得理解的是对的）：p1人们研究一个作家都是从他成名的著作开始的，都不看他的心路历程和成长历史，这些很重要啊，能告诉你他是怎么成为现在的他的；P2。举栗子:有一个叫D的男子，原来好像是个记者，你看他原来的文章能get不少东西。有主旨题：我选了展现value of study  early life，好像是这么造句的。

洛基：有一幅画认为画的是人家在喝酒（摘葡萄）？问怎么加强；两组人一组训练集中精神能力，测试detecting能力的时候训练过的人表现更好，问下列哪个问题可以evaluate。

钙挫：惨不忍睹，第一二题浪费了很久，明明每个字都认识就是不知道连起来说的啥，求教如何克服这个问题，非常需要提高这一块啊，平时做题错的不算多，一上考场就傻

苏雪：1PS那个三个仪表转动的题；
          2DS 小朋友参加夏令营，人数好像是是20-30人之间，问到底几人；（1）少参加一人，其余的可四人一队；（2）少参加两个，其余的可五人一队
          3DS ABC是连续的三个整数 A+B+C＜80 这仨数里最大的等于几？（1）A+B+C＞70 （2）ABC之和的average是偶数
          4PS 收费让人来开派对，X≤10人收100块，X在11-20（后面这个数字记不清了）之间收70+4x，X＞20这个数就收7X，A组来了收100，B组来了收了忘记是100几了，问两组合在一起开high的话,以下哪个金额不可能
           5DS：三角形面积等于多少？见下图
           6DS：BR平分∠ABC？见下图

坐稳：金融分析师对投行部门老板说：
C's cloth is hot trend in youth. 这两年在retail outlet卖的很好。最近打算自己去开retail store了。鉴于它的火爆、Management's aggressively expansion以及CEO曾经是摇滚歌手能带来的明星效应，建议所有的客户都去买它的股票。

大家加油！

zhengtao1992

感谢楼主放狗

billyisfragile!

https://www.lpl.arizona.edu/~renu/malhotra_preprints/1999-sciam.pdf

At distances of less than 0.5 AU from a star,there is insufficient mass in the primordial disk for solid protoplanetary coresto condense. Furthermore, it is questionable whether a protoplanet in a closeorbit could attract enough ambient gas to provide the massive envelope of aJupiter-like planet. One reason is simple geometry: an object in a tight orbittravels through a smaller volume of space than one in a large orbit does. Also,the gas disk is hotter close to the star and hence less likely to condense ontoa protoplanetary core. These considerations have argued against the formationof giant planets in very short-period orbits.

The third mechanism is the scattering of large planets that either formed in or moved into orbits too close to one another for long-term stability. In this process, the outcomes would be quite unpredictable but generally would yield very eccentric orbits for both planets. In some fortuitous cases, one of the scattered planets would move to an eccentric orbit that would come so near the star at its closest approach that tidal friction would eventually circularize its orbit; the other planet, meanwhile, would be scattered to a distant eccentric orbit. All the mechanisms accommodate a broad range of final orbital radii and orbital eccentricities for the surviving planets

是原文吗？

zclydia

The second mechanism is the scattering of large planets that either formed in or moved into orbits too close to one another for long-term stability.这一句一模一样，后面跟了一句是全文最后一句：意思也就是有的变远了有的变近了。

zclydia

bzy! 发表于 2018-6-28 20:28
https://www.lpl.arizona.edu/~renu/malhotra_preprints/1999-sciam.pdf

At distances of less than 0.5 A ...

Furthermore, it is questionable whether a protoplanet in a closeorbit could attract enough ambient gas to provide the massive envelope of aJupiter-like planet. One reason is simple geometry: an object in a tight orbittravels through a smaller volume of space than one in a large orbit does. Also,the gas disk is hotter close to the star and hence less likely to condense ontoa protoplanetary core. 这就是第一段最后一句高亮的内容

billyisfragile!

zclydia 发表于 2018-6-28 20:44
Furthermore, it is questionable whether a protoplanet in a closeorbit could attract enough ambient ...

COuld you edit your original post so that yuedujun can read this?

聪明代表

LZ这题咋做呀～～

3DS ABC是连续的三个整数 A+B+C＜80 这仨数里最大的等于几？（1）A+B+C＞70 （2）ABC的average是偶数

zclydia

聪明代表 发表于 2018-7-5 20:03
LZ这题咋做呀～～

3DS ABC是连续的三个整数 A+B+C＜80 这仨数里最大的等于几？（1）A+B+C＞70 （2）ABC的a ...

条件二写的不清楚，意思是ABC之和的平均数是偶数。解题思路如下图。

聪明代表

聪明代表 发表于 2018-7-5 20:03
LZ这题咋做呀～～

3DS ABC是连续的三个整数 A+B+C＜80 这仨数里最大的等于几？（1）A+B+C＞70 （2）ABC的a ...

谢谢楼主！！