历年托福真题答案

历年托福真题答案

【篇一：历年托福考试阅读高频真题汇总【含答案】】

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历年托福考试阅读高频真题汇总【含答案】

摘要：

之前我们已经上传了历年来托福阅读考试的真题题目，今天

小编接着为大家介绍一些 托福阅读考试过程中经常遇到的一些真题

类型，这些题目全部是精华内容，非常值得大家 拥有。

历年

托福

考试阅读高频真题依次从上到下，出题频率由高到低，

下面我们 现将其中的一篇出题率极高的文章内容分享给你。

if food is allowed to stand for some time, it putrefies. when

the putrefied material is examined microscopically, it is found

to be teeming with bacteria. where do these bacteria come

from , since they are not seen in fresh food? even until the

mid-nineteenth century, many people believed that such

microorganisms originated by spontaneous generation, a

hypothetical process by which living organisms develop from

nonliving matter.

the most powerful opponent of the theory of spontaneous

generation was the french chemist and microbiologist louis

pasteur(1822-1895).pasteur showed that structures present in

air closely resemble the. microorganisms seen in putrefying

materials .he did this by passing air through guncotton filters,

the fibers of which stop solid particles. after the guncotton was

dissolved in a mixture of alcohol and ether, the particles that it

had trapped fell to the bottom of the liquid and were examined

on a microscope slide .pasteur found that in ordinary air these

exists a variety of solid structures ranging in size from 0.01

mm to more than 1.0 mm .many of these bodies resembled the

reproductive

structures of common molds, single-celled animals, and

various other microbial cells. as many as 20 to 30 of them were

found in fifteen liters of ordinary air ,and they could not be

distinguished from the organisms found in much larger

numbers in putrefying materials .pasteur concluded that the

organisms found in putrefying materials originated from the

organized bodies present in the air. he postulated that these

bodies are constantly being deposited on all objects.

pasteur showed that if a nutrient solution was sealed in a

glass flask and heated to boiling to destroy all the living

organisms contaminating it, it never putrefied. the proponents

of spontaneous generation declared that fresh air was

necessary for spontaneous generation and that the air inside

the sealed flask was affected in some way by heating so that it

would no longer support spontaneous generation. pasteur

constructed a swan-necked flask in which putrefying materials

could he heated to boiling, but air could reenter. the bends in

the neck prevented microorganisms from getting in the flask..

material sterilized in such a flask did not putrefy.

1. what does the passage mainly discuss? d

(a) pasteur’s influence on the development of the microscope.

(b) the origin of the theory of spontaneous generation .

(c) the effects of pasteurization on food.

(d) pasteur’s argument against the theory of spontaneous

generation .

2. the p

hrase “teeming with ”in line 2 is closest in meaning to

a

(a) full of

(b) developing into

(c) resistant to

(d) hurt by

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3. which of the following questions did the theory of

spontaneous generation attempt to answer? a

(a) what is the origin of the living organisms are seen on

some food?

(b) how many types of organisms can be found on food?

(c) what is the most effective way to prepare living organisms

for microscopic examination?

(d) how long can food stand before it putrefies?

4. the word “resemble” in line 7 is closest in meaning to b

(a) benefit from

(b) appear similar to

(c) join together with

(d) grow from

5,the purpose of the “guncotton” mentioned in paragraph 2

was to a

(a) trap particles for analysis

(b) slow the process of putrefaction

(c) increase the airflow to the microscopic slide

(d) aid the mixing of alcohol and ether

6. the author mention “1.0mm”in lines 11

-12 in describing the

d

(a) thickness of a layer of organisms that was deposited on

an object

(b) diameter of the fibers that were in the guncotton filters

(c) thickness of the microscope slides that were used

(d) size of the particles that that were collected

7. the word “postulated” in line

16 is closest in meaning to d

(a) analyzed

(b) doubted

(c) persuaded

(d) suggested

8. the objects that pasteut removed from the air in his

experiment were remarkable because they were b

(a) primarily single-celled organisms

(b) no different from objects found in putrefying materials

(c) fairly rare

(d) able to live in a mixture of alcohol and ether

9. the word “it” in line 18 refers to a

(a) a nutrient solution

(b) a glass flask

(c) boiling

(d) spontaneous generation

10. according to paragraph 3,proponents of spontaneous

generation believed that which of the following was important

for the process to succeed ? b

(a) a sealed container

(b) fresh air

(c) heat

(d) the presence of nutrients

......

以上就是有关历年

托福考试

阅读高频真题的部分内容介 绍，稍后

我们会陆续为大家介绍更多有关

托福阅读

考试的相关内容，希望对你的托福考试会有一定的帮助。

【篇二：历年托福写作真题题目汇总】

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历年托福写作真题题目汇总

摘要：

随 着托福考试机制的日渐完善，托福考试遇到重重复的试题

的机会越来越少，但是托福写作 真题的参考价值还是很重要的，本

文为大家搜集了历年来出现的高频托福写作题目。

同学们常常因为找不到托福精品资料 而烦恼，在这里小编为大家分

享一些考生经常搜寻的资料，以便节省大家时间，