18．Animal experimentation is the backbone of American research and treatment of disease．Each year.17——青夏教育精英家教网—

18．Animal experimentation is the backbone（支柱，基础） of American research and treatment of disease．Each year，17million to 22million animals are sacrificed in the name of science．While 90percent of them are rats and mice，180，000dogs，50，000cats，61，000monkeys and 554，000rabbits are done away with in laboratories operated by industry and government．
But the public has raised an outcry（导致抗议） over these deaths．Spurred（驱策，刺激） vivid（生动的） reports of cruelty，the animal rights movement is made up of 7，000organizations with 10million members．They've documented cases in which monkeys were isolated（隔离） in steel tanks（箱、柜） for 45days and dogs were bombarded（轰击、辐射） with radiation or chemicals until they bled from the mouth．
Scientists say such incidents are rare．Laws have been passed to govern testing．Many research centers now have committees to review all proposed animal experiments，and computers can be used in place of animals in many experiments．But scientists say they can't do without animals to test new drugs and treatments on animals to make sure they're safe for humans．Animal experiments produced vaccines（疫苗） or treatments for diseases such as diabetes（糖尿病），and techniques used in open heart surgery．They're important to efforts to find a treatment for AIDS．
Animal rights activists have shown they will go to almost any length．One New York researcher received more than 10，000protest（抗议） letters following publicity of her experiments in which she gave drugs to monkeys．The researcher was studying drug addiction．A protester was arrested in Connecticut for placing a pipe bomb（铁管土炸药）outside a company that used animals in tests．After fires and break-ins，many labs have bought electronic locks and alarms for protection．Other targets of the animal rights movement are the fur industry，farms，and school biology classes in which children dissect（解剖） frogs．
The movement has scored some successes．A dozen states no longer allow pounds（兽栏）──places that accept dogs and cats that have no homes──to sell animals to scientists．Scientists claim the cost of their work will rise as a result．
The battle between scientists and activists raises a basic question：Can modern society be both humane（仁慈的） in its treatment of living things and advanced in its treatment of disease？It seems certain there will be new restrictions placed on the use of animals in scientific experiments．
58．The main idea of the article isA．
A．fewer animals should be taken to laboratories
B．Americans are questioning the use of animals in experiments
C．mice and rats make the best subjects for experiments
D．scientific experiments can be carried out without animals
59．Animal experiments will probably continue becauseC．
A．scientists insist they are harmless
B．the groups that oppose them aren't very big or powerful
C．they are critical for understanding and curing human disease
D．there are enough regulations to protect animals from abuse
60．Supporters of animal rights are most convincing when theyD．
A．explode bombs at laboratories that conduct scientific tests
B．point out the diseases that have been cured by scientists
C．threat their own pets kindly
D．give examples of animals that were mistreated in labs
61．Scientists will be satisfied only ifA．
A．they can continue using animals in their experiments
B．the animal rights movement comes to a stop．
C．they install locks and alarms on their labs
D．their supply of animals is increased significantly．

15．Shortly afterwards，the police stopped the car and both men were arrested．

14．‘I left the money in my room，and it's not there now．'The manager was sympathetic，but he could do nothing．

13．Health is by all means the most important，and we shouldn't be embarrassed about our weight．

12．How can we trust you any more？We won't tolerate such behavior in our house．

11．I have been offered a large sum of money to go away，but I am determined to stay here．（决心）

10．The concept of homeschooling is not a new one．Homeschooling means educating children at home instead of sending them to public or private schools．Nowadays，homeschooling has become popular in many countries for a variety of reasons．One of them is poor quality of education in public schools and it's also because private schools are quite expensive．Some parents believe that because they know their child's strengths and weaknesses，they can teach him or her better．Some parents prefer homeschooling so as to prevent their children from getting into bad company．There is another group of people who choose to educate their children at home because they want them to learn spirit and values of the family and also their religious beliefs．They also think that homeschooling would help in development of strong family bonds（家庭纽带）．
However，homeschooling is to some extent not good for students as well as parents．
Homeschooling is a full-time job and not fit for parents who have their own careers．It takes a lot of time for parents'side to make homeschooling a success．Other family members'responsibilities may also be affected．They may give their full attention to the needs of their children．Besides，a parent may have high educational qualifications，but that does not make him or her a good teacher．Teaching is an art，which requires the ability to understand the needs of the children．It is likely that the parent might have forgotten what he or she has learned，and the curriculum（课程） of the children would also be different．This would make it difficult for the parents to explain the concepts to their children．Parents also have the responsibility of designing the curriculum of students．
In today's world，competition is seen in every field，and school prepares children to face these competitions．However，homeschooling does not give the children a chance to compare with other kids．They will also not be aware of where they stand in educational position among their classmates．This may affect their future lives．Education is not the only thing that the children need to become successful human beings．It is necessary that they learn to communicate in the society，and public school provides them with such an environment，where they meet many people．Schools also provide children with a chance to take part in various activities to improve their overall development．
It is true that it has many benefits，but one must know that school teaches children skills to face and survive．
Homeschooling

Definition	Educating children at home instead of in （56）public schools or private ones．
（57）Reasonsfor the popularity	Poor quality of education in public schools and fees in private schools are not（58）cheap/low． Children are taught （59）betterat home． Children are kept away from bad company． Homeschooling is （60）helpfulin strengthening family bonds
Negative （61）effects	For parents They can't （62）focus/concentrateon their full-time jobs． They can't be good （63）teachers．
Negative （61）effects	For children They will not （64）realize where they should be among their classmates． They lack an environment where they meet many people． They can't join in （65）various activities．

9．Harvard researchers have created a tough，low-cost，biodegradable （可生物降解的） material inspired by insects'hard outer shells．The material's inventors say it has a number of possible uses and someday could provide a more environmentally friendly alternative to plastic．The material，made from shrimp （'虾） shells and proteins produced from silk，is called"shrilk．"It is thin，clear，flexible and strong．
A major benefit of the material is its biodegradability．Plastic's toughness and flexibility represented a revolution in materials science during the 1950s and'60s．Decades later，however，plastic's very durability （耐用性） is raising questions about how appropriate it is for one-time products such as plastic bags，or short-lived consumer goods，used in the home for a few years and then cast into a landfill where they will degrade for centuries．What is the point of making something that lasts 1，000years？
Shrilk not only will degrade in a landfill，but its basic components are used as fertilizer（肥料），and so will enrich the soil．
Shrilk has great potential，the inventors said．Materials from which it is made are plentiful in nature，found in everything ranging from shrimp shells，insect bodies to living plants．That makes shrilk low cost，and its mass production possible should it be used for products demanding a lot of material．
Work on shrilk is continuing in the lab．The inventors said the material becomes flexible when wet，so they're exploring ways to use it in wet environments．They're also developing simpler production processes，which could be used for non-medical products，like for computer cases and other products inside the home．They're even exploring combining it with other materials，like carbon fibers，to give it new properties．
49．Paragraph I of the passage is mainly about shrilk'sC．
A．remarkable designB．interesting name
C．major featuresD．basic elements
50．What has become a concern about plastic？A
A．Using it properly．
B．Producing it cheaply．
C．Developing its properties quickly．
D．Evaluating its contributions fairly．
51．According to the inventors，shrilk has great potential partly becauseD．
A．it can help plastic degrade
B．it can be found in living things
C．its mass production has been realized
D．its raw materials are abundant in nature
52．Which of the following can be the best title for the passage？D
A．Recent Progress in Environmental Protection
B．Benefits of Insects in Scientific Research
C．The Harm of One-time Products
D．A Possible Alternative to Plastic．

0 138550 138558 138564 138568 138574 138576 138580 138586 138588 138594 138600 138604 138606 138610 138616 138618 138624 138628 138630 138634 138636 138640 138642 138644 138645 138646 138648 138649 138650 138652 138654 138658 138660 138664 138666 138670 138676 138678 138684 138688 138690 138694 138700 138706 138708 138714 138718 138720 138726 138730 138736 138744 151629

试题分类