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znlovehk

是那个问b是不是圆心么 也觉得是c诶，不知道构筑选什么了

Dave1337

zhoucuiye 发表于 2018-7-10 22:37
感觉语法如何啊？你平常怎么复习语法的呢？

語法我覺得不難，寫到最後幾題還能用考點快速抓出，還以為掉庫了
平時複習語法靠曼哈頓還有自己的錯題筆記囉

Dave1337

znlovehk 发表于 2018-7-10 22:38
是那个问b是不是圆心么 也觉得是c诶，不知道构筑选什么了

選C
沒錯是你說的那題

GMAT_800

谢谢LZ 分享！

请问下LZ 这道CR C是什么思路啊？还是不太懂诶。。。

GMAT_800

还有LZ能不能回忆得起数学有哪些难题么？ 考了哪些知识点？
明天就要考试了 但是感觉这次的狗不够多诶。。。 想再补下知识点 谢谢了！

Dave1337

GMAT_800 发表于 2018-7-10 23:09
还有LZ能不能回忆得起数学有哪些难题么？ 考了哪些知识点？
明天就要考试了 但是感觉这次的狗不够多诶。。 ...

我有補充一題數學
希望你今天還順利

GMAT_800

Dave1337 发表于 2018-7-11 23:36
我有補充一題數學
希望你今天還順利

谢谢！ 还是失败了 一起加油准备再战吧！

billyisfragile!

再來一篇今天的RC JJ很像"火星上有水"的，但看了才發現不一樣，這篇是"水星上有水“，回憶一下
P1: 科學家本來認為水星上不會有水，因為離太陽近溫度非常高，沒有適合水存在的溫度。然而最近出來的衛星影像照片surprisingly，看到在水星北極有300~600公里的痕跡，科學家將這些痕跡和火星上南北極冰帽比較發現很像，因此認為水星上可能有冰存在。
P2: (這段架構是作者給兩個解釋)
然而為什麼水星這個高溫下會有冰存在呢？ 作者認為
原因1: 水星的自轉（或是公轉？）軸與它和太陽之間的位置連線幾乎是個直角（right angle），因此造成極區（pole）有些地方不會受到太陽照射，可能有合適的低溫條件
原因2: 衛星影像是可以穿過（see through）土壤的，因此或許衛星影像拍到的痕跡是包覆在土壤之下的，土壤之下溫度沒有那麼高

是原文吗？

https://www.newscientist.com/article/mg13618504-900/

Muhleman’s team illuminated Mercury continuously for eight hours with
a 500-kilowatt signal at a wavelength of 3.5 centimetres using the 70-metre
dish at Goldstone. The faint echoes were picked up by the VLA. The radar
images, which revealed detail as small as 150 kilometres across, were dominated
by an apparently elliptical feature between 300 and 600 kilometres across,
quite close to Mercury’s north pole. A comparison of these images with similar
studies of the ice on Mars and of Jupiter’s satellites led the researchers
to the conclusion that these prominent echoes were coming from a very cold,
highly fractured layer of water ice.

So where could the ice have come from? Volatile substances such as water
could be driven from the rocks as they boil under the midday sun. Such gases
would then either escape into space or settle as ‘snow’ in the cold polar
regions. Further supplies of water and carbon dioxide ice could be brought
at regular intervals by comets and asteroids, which vaporise on impact with
the planet. Such ice might remain intact for a long time, according to Slade.
‘Since radar can see through loose surface debris, it is possible that the
ice is buried,’ he explains. A blanket of material, perhaps 50 centimetres
thick, could prevent the icecap from melting and from being eroded by interstellar
radiation.

Dave1337

bzy! 发表于 2018-7-14 00:02
是原文吗？

https://www.newscientist.com/article/mg13618504-900/

是