托福阅读真题练习：抗生素的文本+真题+答案

2017年11月10日14:59 来源：小站整理: 参与（1）阅读（7267）

摘要：托福阅读真题哪里有?大家平时备考托福阅读考试的时候都用的是哪些真题呢?除了官方真题Official的托福阅读真题以外，大家进行托福阅读的练习大多数可能都是根据老托资料或者是课外资料来练习了。那么到哪里去找到托福阅读真题来进行练习呢?

托福阅读如何进行备考?除了大量的托福词汇储备以外，大家可能最需要的就是托福阅读真题的练习。那么除了官方真题Official你还有哪些托福阅读真题进行练习呢?今天小编就为大家整理了托福阅读真题100篇：抗生素的文本、题目以及答案，希望可以帮助到大家。

托福阅读100篇真题练习汇总：http://toefl.zhan.com/tfziliao63739.html

托福阅读文本：

Elizabeth Hazen and Rachel Brown copatented one of the most widely acclaimed wonder drugs of the post-Second World War years. Hazen and Brown's work was stimulated by the wartime need to find a cure for the fungus infections that afflicted many military personnel.

Scientists had been feverishly searching for an antibiotic toxic enough to kill the fungi but safe enough for human use, since, unfortunately, the new "wonder drugs" such as penicillin and streptomycin killed the very bacteria in the body that controlled the fungi. It was to discover a fungicide without that double effect that Brown, of New York State's Department of Health Laboratories at Albany, and Hazen, senior microbiologist at the Department of Health in New York, began their long-distance collaboration. Based upon Hazen's previous research at Columbia University, where she had built an impressive collection of fungus cultures, both were convinced that an antifungal organism already existed in certain soils.

They divided the work. Hazen methodically screened and cultured scores of soil samples,which she then sent to her partner, who prepared extracts, isolated and purified active agents, and shipped them back to New York, where Hazen could study their biological properties. On a 1948 vacation, Hazen fortuitously collected a clump of soil from the edge of W.B. Nourse's cow pasture in Fauquier County, Virginia, that, when tested, revealed the presence of the microorganisms. In farm owner Nourse's honor, Hazen named it Streptomyces Noursei, and within a year the two scientists knew that the properties of their substance distinguished it from previously described antibiotics. After further research they eventually reduced their substance to a fine, yellow powder,which they first named "fungiciden." Then renamed "nystatin" (to honor the New York State laboratory) when they learned the previous name was already in use. Of their major discovery,Brown said lightly that it simply illustrated "how unpredictable consequences can come from rather modest beginnings."

托福阅读题目：

1. What is the main topic of the passage ?

(A) The lives of Hazen and Brown.

(B) The development of a safe fungicide.

(D) The development of penicillin.

2. What can be inferred from the passage about penicillin?

(A) It effectively treats fungus infections.

(B) It was developed before nystatin.

(D) One of its by-products is nystatin.

3. Why does the author mention Columbia University in line 10?

(A) Hazen and Brown developed nystatin there.

(B) Brown was educated there.