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托福阅读词汇题：postulated&hypothesized

2015-08-25 10:55:17来源：网络

　　【托福阅读词汇题：postulated&hypothesized】新托福TPO阅读中，词汇题是重要托福阅读题型。托福阅读词汇题做题需要考生掌握一定的词汇量和做题技巧。本文中新东方在线托福网汇总了新托福阅读词汇150题：postulated&hypothesized。

　　Paragraph 4: The structure of the periodic table appeared to limit the number of possible elements. It was therefore quite surprising when John William Strut( Lord Rayleigh, discovered a gaseous element in 1894 that did not fit into the previous classification scheme. A century earlier, Henry Cavendish had noted the existence of a residual gas when oxygen and nitrogen are removed from air, but its importance had not been realized. Together with William Ramsay, Rayleigh isolated the gas (separating it from other substances into its pure state) and named it argon. Ramsay then studied a gas that was present in natural gas deposits and discovered that it was helium, an element whose presence in the Sun had been noted earlier in the spectrum of sunlight but that had not previously been known on Earth. Rayleigh and Ramsay postulated the existence of a new group of elements, and in 1898 other members of the series (neon, krypton, and xenon) were isolated. 【TPO16- Development of the Periodic Table】

　　12. The word “postulated” in the passage is closest in meaning to

　　○hypothesized

　　○discovered

　　○reported

　　○generated

　　答案见下一页：

本文关键字: 新托福阅读 托福阅读词汇 托福词汇题

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