There is a simultaneous trial taking place in the next build.

A. fair
B. full
C. coexisting
D. public

The second paragraph mainly discusses__________. 查看材料

A. a report about Washoe"s progress in learning sign language.
B. the whole direction of primate research.
C. new primate researches conducted by many language scientists.
D. an experiment with Washoe at a research center in Africa.

At the same time， they will construct a new school in the community.

A. Simultaneously
B. Radically
C. Absolutely
D. Basically

Class size will increase under the new scheme.

A. direction
B. context
C. system
D. environment

？？A. By carefully studying the present, skilled businessmen scientists, and politicians are supposedly able to figure out in advance what will happen.B. School would be taught "by electrical impulse while we sleep."C. One forecaster knew that predictions about the future would always be subject to significant errors.D. In early 1929, most forecasters saw an excellent future for the stock market.E. Everyone may look to the future for it is always promising.F. Actually, the article was written in 1958 and the question was, "what will life be like in 19787"？？

ates of Marriage in America<br>The United States has historically had higher rates of marriage than those of other industrialized countries. The current annual marriage 51 in the United States--about 9 new marriages for every 1,000 people--is 52 .higher than it is in other industrialized countries. However, marriage is 53 as widespread as it was several decades ago. 54 of American adults who are married 55 from 72 percent in 1970 to 60 percent in 2002. This does not mean that large numbers of people will remain unmarried 56 their lives. Throughout the 20th century, about 90 percent of Americans married at some 57 in their lives. Experts 58 that about the same proportion of today&39;s young adults will eventually marry.<br>The timing of marriage has varied 59 over the past century. In 1995 the average age of women in the United States at the time of their first marriage was 25. The average age of men was about 27. Men and women in the United States marry for the first time an average of five years later than people did in the 1950s. 60 , young adults of the 1950s married younger than did any previous 61 in U. S. history. Today&39;s later age of marriage is 62 the age of marriage between 1890 and 1940. Moreover, a greater proportion of the population was married (95percent ) during the 1950s than at any time before 63 . Experts do not agree on why the "marriage rash" of the<br>late 1940s and 1950s occurred, but most social scientists believe it represented a 64 to the return of peaceful life and prosperity after 15 years of severe economic 65 and war.<br>材料题请点击右侧查看材料问题 查看材料

A. rate
B. ratio
C. percentage
D. poll

panic<br>A panic is a form. of collective in which a group of people, face with an immediate threat, re- act in an uncoordinated and irrational way. Their behawor is uncoordinated in the sense that co- operative social relationships and break down. It is irrational in the sense that people&39;s actions are not appropriate for the goals they wish to achieve.<br>The progress of a panic follows a fairly typical course. A sudden crisis occurs ; people experi- ence intense fear; normal social expectations are broken; each individual tries desperately to es- cape from the source of danger; mutual cooperation breaks down; and the situation becomes even more threatening as a result. Panics are especially likely to occur in unusual conditions in which everyday norms have little relevance, such as fires, floods, earthquakes or military invasions.<br>Some kind of response is necessary in these situations, but there are few social norms that specify an appropriate reaction. Thus, when a passenger aircraft makes a crash landing people may at- tempt to flee before fire breaks out and cause an explosion, but there only succeed in stopping themselves and others by creating bottlenecks at the exits. Awareness of bottlenecks, may lead to increased panic, with people fighting and trampling one another in the effort to escape. Despite intensive training of airline personnel in emergency evacuation procedures, a high proportion of passenger deaths are caused by a panic that prevents people from escaping in time.<br>The most dramatic panics are those that occur in situations of extreme emergency, but not all panics are quite so frantic or short-lived. A different form. of this collective behavior. is the finan- cial panic, which is typically provoked by rumor that the price of stocks will fall or that a bank will be unable to repay its depositors. The classic example, of course, occurred at the outset of the Great Depression in 1929: as in other forms of panic, the individuals involved tried to protect their own interests, and in so doing they worsened the situation for themselves and everyone else. By trying to sell their stocks as quickly as possible, people ensured that the price of stocks did fall; by demanding their money back from banks, they ensured that the banks actually did collapse.<br>What will people not do when they feel panic？ 查看材料

A. They become uncoordinated
B. They become irrational
C. They face an immediate threat
D. They break down cooperative social relationships

Study Says Dogs Can Smell Cancer<br>Dogs are knowrn for their sense of smell. They can find missing people and things like bombs and illegal drugs. Now a study suggests that the animal known as man&39;s best friend can even find bladder(膀胱) cancer.<br>Cancer cells are thought to produce chemicals with unusual odors(气味). Researchers think dogs have the abilit)to smell these odors, even in very small amounts, in urine(尿). The sense of smell in dogs is thousands of times better than in humans.<br>The study follows reports of cases where, for example, a dog showed great interest in a growth on the leg of its owner. The mole(痣)was later found to be skin cancer.<br>Carolyn Willis ted a team of researchers at Amersham Hospital in England. They trained different kinds of dogs for the experiment. The study involved urine collected from bladder cancer patients ,from people with other diseases and from healthy people.<br>Each dog was tested eight times. In each test there were seven samples for the dogs to smell.<br>The dog was supposed to signal the one from a bladder cancer patient by lying down next to it.<br>Two cocker spaniels(短腿长毛垂耳小猎犬) were correct fifty-six percent of the time. But the scieatists reported an average success rate of forty-one percent.<br>As a group, the study found that the dogs chose the correct sample twenty-two out of fifty-four times. That is almost three times more often than would be expected by chance alone.<br>The British Medical Journal published the research. In all, thirty-six bladder cancer patients and one hundred and eight other people took part.<br>During training, all the dogs reportedly even identified a cancer in a person who had tested healthy before the study. Doctors found a growth on the person&39;s right kidney(肾).<br>Bladder cancer is the ninth most common cancer worldwide. The International Agency for Re-search on Cancer says this disease kills more than one hundred thousand people each year. Doctors say cigarette smoking is the leading cause of bladder cancer.<br>The experiment was conducted in a __________. 查看材料

A. police station
B. hospital
C. training school
D. private home

Arthritis c关节炎) is an illness thatcan cause pain and swelling in your bones. Toads (蟾蜍),a big problem inthe north of Australia, are suffering from painful arthritis in their legs andbackbone, a new study has shown. The toads that jump the fastest are morelikely to be larger and to have longer legs. (46)<br>The large yellow toads,native to South and Central America, were introduced into the north-easternAustralian state of Queenslandin 1935 in an attempt to stop beetles and other insects from de-stroyingsugarcane crops. Now up t0 200 million of the poisonous toads exist in thecountry, and they are rapidly spreading through the state of Northern Territory at a rate of up t0 60 kma year. The toads can now be found across more than one million squarekilometers. (47) A Venezuelanpoison virus was tried tin the 1990s but had to be abandoned after it was foundto also kill native frog species.<br>The toads have severelyaffected ecosystems inAustralia.Animals, and sometimes pets, that eat the toads die immediately from theirpoison, and the toads themselves eat anything they can fit inside their mouth._ (48)<br>A co-author of the newstudy, Rick Shine, a professor at the University of Sydney,says that lit-tle attention has been given to the problems that toads face.Rick and his colleagues studied nearly 500 toads from Queenslandand the Northern Territoryand found that those in the latter state were very different. They were active,sprinting down roads and breeding quickly.<br>According to the results ofthe study, the fastest toads travel nearly one kilometer a night. (49) But speed and strength come at aprice-arthritis of the legs and backbone due to con-stant pressure placed onthem.<br>Inlaboratory tests, the researchers found that after about 15 minutes of hopping,arthritic toads would travel less distance with each hop (跳跃). _ (50) These toads are so programmedto move~ apparently, that even when in pain the toads travelled as fast and asfar as the healthy ones, continuing their constant march across the landscape.<br>46<br>47<br>48<br>49<br>50

The human body is truly amazing. It allows us to sense the world around us, to do work and have fun, and to move from place to place. In fact, the human body does its work so well that most people don't think about it very much - until they get sick.<br>The germs (致病菌) that make people sick are everywhere. You can't see them, but they're there. They're sitting on your desk. They're hiding on your computer's keyboard. They're even in the air that you are breathing. There are two types of germs: viruses and bacteria（细菌）. Viruses are germs that can only live inside animals or plants. Viruses cause illnesses such as flu and measles（麻疹）. Bacteria are tiny creatures. Some bacteria are good. They can help your stomach break down food. Other bacteria aren't so good. They can make you sick. Bacteria can cause sore throats（喉痛） and ear infections.<br>How can you'stop these tiny invaders from making you sick？ Your skin is the first defense against germs. You can prevent some illnesses simply by washing, with soap and water. But germs can still enter the body through small cuts in the skin or through the mouth, eyes, and nose.<br>Once germs are inside your body, your immune(免疫的) system tries to protect you. It looks for and destroys germs. How does it do that？ Special cells patrol your body. Some of these cells actually eat germsl Other cells make antibodies. An antibody sticks to a germ. There is a different antibody for each kind of germ. Some antibodies keep germs from making you sick. Others help your body find and kill germs. After a germ is destroyed, the antibodies stay in your body. They protect you if the same kind of germ comes back. That way you will not get the same illness twice.<br>You can keep your body healthy by eating a nutritious (有营养的 ) diet to make your immune sys- tem strong. You can also help your immune system fight germs by getting vaccinated（接种）. Vaccines are medicines. They contain germs that have been killed or weakened. The dead germs can't make you sick. Instead, they cause your body to make antibodies. If the same germ ever shows up again, then your antibodies attack it.<br>Viruses can only live inside people or animals

A. Right
B. Wrong
C. Not mentioned