Question

这道GRE逻辑题目翻译及其解析，出自新GRE阅读逻辑10套

The early universe contained only the lightest elements， hydrogen and helium. Heavier elements，such as carbon， form only in nuclear reactions in stars and are dispersed when the stars explode. A recently discovered gas cloud contained carbon several billion years ago， when the universe was no more than two billion years old.

　　If the statements above are true， which of the following must， on the basis of them， also be true？

　　（A）The earliest stars contained only hydrogen.

　　（B）Some stars were formed before the universe was two billion years old.

　　（C）The carbon in the gas cloud later formed part of some stars.

　　（D）No stars identified to date are as old as the gas cloud.

　　（E）The gas cloud also contained hydrogen and helium.

Answer 1

E
A错，B错，C错先有star后有gas cloud， D 错star is older than gas cloud

追问

额，您的答案和标准答案不符。

追答

标准答案错

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那B为什么错了呢？

追答

现有宇宙

追问

比较愚钝，能解释的详细点吗？

追答

宇宙20亿岁之前就有星球。这个是对的。碳是在星球上生成，20亿年前有气云，气云是星球爆炸产生的 所以这句话是对的。

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那B选项说他星球在宇宙之前产生，不是对的吗？

追答

对

追问

额，那就是这道题目有问题，E和B都对吗？

追答

是的 我觉得如此

Answer 2

请问E是如何推导的呢？从题目里我们得到的信息只能是在宇宙产生之前就有了星云，并且星云含有碳，又因为碳只在星球里面，所以有碳就有星球，所以只能推出宇宙产生之前就有了碳啊，E不能推出吧，至少题目信息没有这样暗示！