问下TPO16第三篇太阳系星星一道题

LRXSSUID: 2695903

第四题吧
  


我不明白为什么A不对   他其实也没有明确说明每个J集团星星都比T集团星星密度小啊

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>___<<  没人做么

hongwei0258520UID: 2722087

这一题，B肯定是错误的。gases, rocks,ices是组成planet的三种物质。 TP的平均密度是水的5倍，而S只有水的0.7倍，所以A可以看做是正确的

LRXSSUID: 2695903

3# hongwei0258520

B 也没有直接说明   怎么知道肯定错误？
E种类平均密度是J种类的5倍 +J有一个密度是水密度的0.7倍
就可以认为J比任何E小？   我认为逻辑不通

TOEFL20110129UID: 2989992

原文如下：
The substances that make up both groups of plants are divided into three groups - gases, rocks, and ices - based on their melting points. The terrestrial planets are mostly rocks: dense rocky and metallic material, with minor amounts of gases. The Jovian planets, on the other hand, contain a large percentage of the gases hydrogen and helium, with varying amounts of ices: mostly water, ammonia, and methane ices.

当我做题的时候，我的理解就是把这两个planet分类，交集是gases, the terrestrial planets独有的是rocks顺带少量的气体,the Jovian planets独有的是冰主要是气体，所以两个planet都有气体，但是Saturn 属于one of the outer planets - the four Jovian planets are known as the outer planets, 所以Saturn不应该包含rocks
你再看看，我再想想...