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1997年8月托福考试阅读理解全真试题 [5]

论文作者:佚名论文属性:短文 essay登出时间:2009-09-24编辑:lisa点击率:16726

论文字数:1000论文编号:org200909241542423343语种:英语 English地区:中国价格:免费论文

关键词:托福试题

so-called soft x-rays in the wavelength range of twenty to forty
angstroms (an angstrom is one ten-billionth of a meter), is
also sufficiently penetrating to image intact biological cells in
many cases. Because of the wavelength of the x-rays used,
soft x-ray microscopes will never match the highest resolution
possible with electron microscopes. Rather, their special pro-
perties will make possible investigations that will complement
those performed with light- and electron-based instruments.

30.What does the passage mainly discuss?
(A) The detail seen through a microscope
(B) Sources of illumination for microscopes
(C) A new kind of microscope
(D) Outdated microscopic technique

31.According to the passage, the invention of the visible-light microscope allowed scientists to
(A) see viruses directly
(B) develop the electron microscope later on
(C) understand more about the distribution of the chemical elements
(D) discover single celled plants and animals they had never seen before.

32.The word "minuscule" in line 7 is closest in meaning to
(A) circular
(B) dangerous
(C) complex
(D) tiny

33.The word "it" in line 10 refers to
(A) a type of microscope
(B) human perception
(C) the natural world
(D) light

34.Why does the another mention me visible light microscope in the first paragraph?
(A) To begin a discussion of sixteenth century discoveries.
(B) To put the x-ray microscope in historical perspective
(C) To show how limited its uses are
(D) To explain how it functioned

35.Why did it take so long to develop the x-ray microscope?
(A) Funds for research were insufficient.
(B) The source of illumination was not bright enough until recently.
(C) Materials used to manufacture x-ray tubes were difficult to obtain
(D) X-ray microscopes were too complicated to operate.

36.The word "enables" in line 30 is closest in meaning to
(A) constitutes
(B) specifies
(C) expands
(D) allows

37.The word "Rather" in line 38 is closest in meaning to
(A) significantly
(B) preferably
(C) somewhat
(D) instead

38.The word "those" in line 40 refers to
(A) properties
(B) investigations
(C) microscopes
(D) x-rays

39.Based on the information in the passage, what can be inferred about x-ray microscopes in the future?
(A) They will probably replace electron microscopes altogether.
(B) They will eventually be much cheaper to produce than they are now.
(C) They will provide information not available from other kinds of microscopes.
(D) They will eventually change the illumination range that they now use.

Question 40-50

Perhaps the most striking quality of satiric literature is its
freshness, its originality of perspective. Satire rarely offers
original ideas. Instead it presents the familiar in a new form.
Satirists do not offer the world new philosophies. What they
do is look at familiar conditions from a perspective that makes
these conditions seem foolish, harmful or affected. Satire jars
us out of complacence into a pleasantly shocked realization that
many of the values we unquestioningly accept are false. Don
Quixote makes chivalry seem absurd, Brave New World
ridicules the pretensions of science, A Modest Proposal
dramatizes starvation by advo论文英语论文网提供整理,提供论文代写英语论文代写代写论文代写英语论文代写留学生论文代写英文论文留学生论文代写相关核心关键词搜索。

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