在平平淡淡的日常中，我们最不陌生的就是练习题了，学习需要做题，是因为这样一方面可以了解你对知识点的掌握，熟练掌握知识点！同时做题还可以巩固你对知识点的运用！你所见过的习题是什么样的呢？以下是小编为大家收集的大学英语四级考试阅读强化训练带答案，供大家参考借鉴，希望可以帮助到有需要的朋友。
The food we eat seems to have profound effects on our ough science has made enormous steps in making food more fit to eat ,it has, at the same time,made many foods unfit to eat. Some research has shown that perhaps eighty percent of all human illnesses are related to diet and forty percent of cancer is related to the diet as well,especially cancer of the colon. Different cultures are more likely to cause certain different illnesses because of the food that is characteristic in these cultures. That food is related to illness is nto a new discovery. In 1945, about 35 years ago, government researchers realized that nitrates, commonly used to preserve color in meats,and other food additivies,caused cancer. Yet, these carcinogenic additives remain in our food, and it becomes more difficult all the time to know which things on the packaging labels of processed food are helpful or harmful. The additives which we eat are not all so direct. Farmers often give penicillin to beef and living animals, and because of this ,penicillin has been found in the milk of treated cow. Sometimes similar drugs are given to animals not for medical purposes,but for financial reasons. The farmers are simply trying to fatten the animals in order to obtain a higher price on the market. Although the Food and Drug Administration(FDA) has tried repeatedly to control these procedures, the practices continue.
is the best possible title of the passage?
and Food
er and Health
and Health
th and Drug
h of the following statements is NOT ture?
s are always given to animals for medical reasons
of the additives in our food are added to the food itself and some are given to the living animals
archers have known about the potential dangers of food additives for over thirty-five years.
may cause forty percent of cancer in world.
has science done something harmful to mankind?
use of science , diseases caused by polluted food haven been virtually eliminated.
has caused a lack of information concerning the value of food.
use of the application of science,some potentially harmful substances have been added to food.
scientists have preserved the color of meats,but not of vegetables.
are nitrates used for?
preserve flavor in packaged foods.
preserve the color of meats.
are the objects of research.
cause the animals to become fatter.
word 'carcinogenic' most nearly means '_____'.
ble-making
r-retaining
y-making
er-causing
答案：cacbd
Not all sounds made by animals serve as language, and we have only to turn to that extraordinary discovery of echolocation (回声定位) in bats to see a case in which the voice plays a strictly practical role.
To get a full appreciation of what this means we must turn first to some recent human inventions. Everyoneknows that if he shouts near a wall or a mountainside, an echo will come back. The further off this solid obstacle, the longer time it will take for the return of the echo. A sound made by tapping on the main body of a ship will be reflected from the sea bottom, and by measuring the time interval between the taps andthe receipt of the echoes the depth of the sea at that point can be calculated. So was born the echo-sounding equipment, now in general use in ships. Every solid object will reflect a sound, varying according to the size and nature of the object. A shoal of fish will do this. So it is a comparatively simple step fromlocating the sea bottom to locating a shoal of fish. With experience, and with improved equipment, it is now possible not only to locate fish but to tell if it is herring, cod, or other well-known fish, by the pattern of its echo.
A few years ago it was found that certain bats emit squeaks (吱吱声) and by receiving ’he echoes they could locate and steer clear of obstacles--or locate flying insects on which they feed. This echolocation in bats is often compared with radar, the principle of which is similar.
练习题：
Choose correct answers to the question:
main purpose of this passage is to ______.
A. describe that animals can make different sounds
B. prove that animals’ voices can play practical roles
C. inspire the readers to make more inventions
D. startle the readers with some shocking facts
2. The discovery of echolocation may help with all of the following EXCEPT
A. measuring the depth of the sea
B. distinguishing different kinds of fish
C. improving the functions of radar
D. varying the size and nature of an object
3. By saying "A shoal of fish will do this"(Lines 6-7, Para. 2), the author means ________.
A. only one special kind of fish can reflect sounds
B. only one special kind of fish can be used to help locate a ship
C. a large group of fish can reflect sounds
D. a large group of fish can be used to help locate a ship
4. As it is discussed in the passage, the squeaks of bats can be functionally compared with ________.
A. human languages
B. a mountainside
C. a shoal of fish
D. taps on a ship
5. Which of the following statements can be inferred from the passage?
A. Animals are more intelligent than humans.
B. Humans are more intelligent than animals.
C. Animals are often compared with human inventions.
D. Humans are often inspired by animals.
答案解析
1.[B] 主旨大意题。文章第1段就点明主题，明确指出以蝙蝠为例，动物发出的声音有实际作用，只有B可以概括文章的这个写作目的。
2.[C] 事实细节题。本题考査列举处，可用排除法解答。A、B、C在文中都有相关提及。D利用第2段中的varying制造干扰。在原文中，指的.是回声因障碍物的不同而不同，而D偷换概念、曲解文意，D中的varying为及物动词，意为“改变”,显然不可能是回声定位的发现带来的功效。
3.[C] 词义推断题。本题考查对shoal的词义推测及代词this的理解。依据第2段最后几句话,可推测出a shoal of fish指的是“海里的一群鱼”;this则是指上一句提到的“任何固体都可以反射声音”，因此这句话表明一大群鱼就能像一个固体一样反射声音。
4.[D] 推理判断题。根据最后一段可知，蝙蝠发出吱吱声可以探测障碍物的距离，而第2段也指出轻敲船体可测知海底的距离，因此在功能上,D与蝙蝠的吱吱声相同。A中的human languages在文中未提到;B和C在文中各自的例子中充当的都是障碍物的角色，因此都不正确。
5.[D] 推理判断题。文章先说动物的回声定位功能,再说到回声定位探测仪的发明,由此可见，是动物的某些能力启发了人类的创造，因此只有D可从文中推测。文章并没有从智力方面比较人类和动物，因此可以排除A 和B;尽管文章说到了蝙蝠和雷达的原理相似，但是C中的often一词无据可循，且C的说法浮于表面，没有说到重点，故排除。
Art is considered by many people to be little more than a decorative means of giving pleasure. This is not always the case, however; at times, art may be seen to have a purely functional side as well. Such could be said of the sandpaintings of the Navaho Indians of the American Southwest; these have a medicinal as well as an artistic purpose.
According to Navaho traditions, one who suffers from either a mental or a physical illness has in come way disturbed or come in contact with the supernatural—perhaps a certain animal, a ghost, or the dead. To counteract this evil contact, the ill person or one of his relatives will employ a medicine man called a “singer” to perform a healing ceremony which will attract a powerful supernatural being.
During the ceremony, which may last from 2 to 9 days, the “singer” will produce a sandpainting on the floor of the Navaho hogan. On the last day of the ceremony, the patient will sit on this sandpainting and the “singer” will rub the ailing parts of the patient’s body with sand from a specific figure in the sandpainting. In this way the patient absorbs the power of that particular supernatural being and becomes strong like it. After the ceremony, the sandpainting is then destroyed and disposed of so its power will not harm anyone.
The art of sandpainting is handed down from old “singer” to their students. The material used are easily found in the areas the Navaho inhabit; brown, red, yellow, and white sandstone, which is pulverized by being crushed between 2 stones much as corns is ground into flour. The “singer” holds a small amount of this sand in his hand and lets it flow between his thumb and fore-finger onto a clean, flat surface on the floor. With a steady hand and great patience, he is thus able to create designs of stylized people, snakes and other creatures that have power in the Navaho belief system. The traditional Navaho does not allow reproduction of sandpaintings, since he believes the supernatural powers that taught him the craft have forbidden this; however, such reproductions can in fact be purchased today in tourist shops in Arizona and New Mexico. These are done by either Navaho Indians or by other people who wish to preserve this craft.
purpose of the passage is to ___.
uss the medical uses of sandpaintings in medieval Europe.
y the ways Navaho Indians handed down their painting art.
ider how Navaho “singer” treat their ailments with sandpaintings.
how Navaho Indians apply sandpainting for medical purposes.
purpose of a healing ceremony lies in ___.
sing the ghosts
acting supernatural powers
acting the ghosts
ting a sandpainting
“singer” rubs sand on the patient because ___.
patient receives strength from the sand
has pharmaceutical value
decorates the patient
of the above
is used to produce a sandpainting?
t
h sand
hed sandstone
r
h of the following titles will be best suit the passage?
A.A New Direction for Medical Research
Navaho Indians’ Sandpainting
Process of Sandpainting Creation
Navaho Indians’ Medical History
答案：
DBACB
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