单选题The language experts believe that the ______ age for learning a foreign language is 6 years old. A. conceptual B. considerate C. optimal D. component

单选题Please ______ yourself from smoking and spitting in public places, since the law forbids them.

单选题Who was the man at the door?

单选题It's easier to dismiss reports of low employee morale than face the facts and act A. consequently B. accordingly C. successfully D. excessively

单选题Humanlike animal behavior has a striking effect. Dogs and eats bolster our morale and make us feel special, because they offer us intense loyalty and do not criticize us. (66) Many people need a caring role in order to feel that they matter, and pets make them feel needed. No matter what arrangements the humans in your life may have made for themselves, if you have a pet there is always someone who will miss you if you do not come home tonight. Taking in a pet can help children to have a greater sense of a contributing role in the family if they take responsibility for the pet's care. Similarly, a dog or cat can help parents whose children have grown up and left home — it can be an antidote to the "empty nest syndrome". (67) Better self-esteem from pet ownership and having someone to care for are of benefit to the lonely. Pets also combat the understimulation that lonely people suffer. (68) Even when the animals you keep are not very human, they can help to combat the effects of loneliness by providing positive "solitary activity. (69) Even by simply walking your dog in the park you are more likely to become involved with other people. Like babies in strollers, dogs on leashes are conversation ice-breakers—they are appealing, and it is socially safe to question strangers about them. A dog, cat or cagebird is someone to talk to. Most pet owners do not really look upon these companions as other species but rather as unique individuals, not quite as "animal" as their wild Brethren. They talk to their pets and feel that there is a reciprocal understanding of moods—a mute communication. And they feel free to say to pets what is really on their minds, thus releasing many of their everyday tensions and anxieties. (70) Even a small but noisy dog is as effective at keeping burglars out as many sophisticated electronic systems. Its inherited urge to join in the cooperative defense of territory makes it the classic watch animal.A. A pet can also provide an outlet for those who have never had anyone to care for.B. Dogs, in particular, can also provide a sense of security.C. They do not lay down conditions for continuing to love us.D. Observations have recorded that men pet their dogs and cats every bit as much as women do.E. They are something to watch and something to keep you busy.F. Pets can also bring lonely people into contact with others who share an interest in annuals.

单选题The local government has __________ the landowners to fish these waters.

单选题You may even become a head waiter eventually. If you have the right sort of______and are not afraid of hard work.

单选题The American economic system is organized around a basically private-enterprise, market-oriented economy in which consumers largely determine what shall be produced by spending their money in the marketplace for those goods and services that they want most. Private businessmen, striving to make profits, produce these goods and services in competition with other businessmen; and the profit motive, operating under competitive pressures, largely determines how these goods and services are produced. Thus, in the American economic system it is the demand of individual consumers, coupled with the desire of businessmen to maximize profits and the desire of individuals to maximize their incomes, that together determine what shall be produced and how resources are used to produce it. An important factor in a market-oriented economy is the mechanism by which consumer demands can be expressed and responded to by producers. In the American economy, this mechanism is provided by a price system, a process in which prices rise and fall in response to relative demands of consumers and supplies offered by seller-producers. If the product is in short supply relative to the demand, the price will be bid up and some consumers will be eliminated from the market. If, on the other hand, producing more of a commodity results in reducing its cost, this will tend to increase the supply offered by seller-producers, which in turn will lower the price and permit more consumers to buy the product. Thus, price is the regulating mechanism in the American economic system. The important factor in a private enterprise economy is that individuals are allowed to own productive resources(private property), and they are permitted to hire labor, gain control over natural resources, and produce goods and services for sale at a profit. In the American economy, the concept of private property embraces not only the ownership of productive resources but also certain rights, including the right to determine the price of a product or to make a free contract with another private individual.

单选题The passage suggests that a geographer would consider a city's soil type part of its ______.

单选题The pop music ______.

单选题Frequently single-parent children ______some of the functions that the absent adult in the house would have served.(2013年厦门大学考博试题)

单选题There are a few small things that I don't like about my job, but ______ it's very enjoyable.

单选题Advancement in the army is often given to the person who ______.

单选题A new biotechnology procedure that could become commercially available in as little as two to four years is "transgenesis", which permits scientists to create an animal with specific traits by adding, removing, inactivating, or repairing genes in an embryo. The additional genes can come from any source. For example, if a gene of interest occurs in mosquitoes—say, one that codes for resistance to a certain disease—it can be removed and places in the embryo of a farm animal. The several strains of commercially useful transgenic farm animals that will probably emerge in the next few years could include leaner pigs, poultry resisting to influenza or other deadly diseases, sheep with wool that is easier to wash, and goats that produce valuable pharmaceuticals in their milk. The simplest way to make transgenic animals is to inject a gene into a one-cell embryo and then implant the embryo in another animal. Under the right conditions, the new gene joins one of the embryo's strands of genes. Each cell created as the embryo divides gets a copy of the new gene. An alternative technique is to incorporate the gene into a type of virus known as a retrovirus that has bean modified so it cannot reproduce itself after entering a cell. The virus, which cannot cause disease, delivers the gene to the cell's nucleus- Often this method is better than gene injection because a retrovirus always delivers just one gene, and the gene is always undamaged and complete.

单选题 Motorways are, no doubt the safest roads in Britain. Mile {{U}}(21) {{/U}} mile, vehicle for vehicle, you are much {{U}}(22) {{/U}} likely to be killed or seriously injured than on an ordinary road. On {{U}}(23) {{/U}} hand, if you do have a serious accident on a motorway, fatalities are much more likely to {{U}}(24) {{/U}} than in a comparable accident {{U}}(25) {{/U}} on the roads. Motorways have no {{U}}(26) {{/U}} bends, no roundabouts or traffic lights and {{U}}(27) {{/U}} speeds are much greater than on other roads. Though the 70 mph limit is {{U}}(28) {{/U}} in force, it is often treated with the contempt that most drivers have for the 30 mph limit applying in built up areas in Britain. Added to this is the fact that motorway drivers seem to like traveling in groups with perhaps {{U}}(29) {{/U}} ten meters between each vehicle. The resulting horrific pile-ups {{U}}(30) {{/U}} one vehicle stops for some reason--mechanical failure, driver error and so on--have become all {{U}}(31) {{/U}} familiar through pictures in newspapers or on television. How {{U}}(32) {{/U}} of these drivers realize that it takes a car about one hundred meters to brake to a stop {{U}}(33) {{/U}} 70 mph? Drivers also seem to think that motorway driving gives them complete protection from the changing weather. {{U}}(34) {{/U}} wet the road, whatever the visibility in mist or fog, they {{U}}(35) {{/U}} at ridiculous speeds oblivious of police warnings or speed restrictions {{U}}(36) {{/U}} their journey comes to a conclusion. Perhaps one remedy {{U}}(37) {{/U}} this motorway madness would be better driver education. At present, learner drivers are barred {{U}}(38) {{/U}} motorways and are thus as far as this kind of driving is {{U}}(39) {{/U}}, thrown in at the deep end. However, much more efficient policing is required, {{U}}(40) {{/U}} it is the duty of the police not only to enforce the law but also to protect the general public from its own foolishness.

单选题 The biggest safety threat facing airlines today may not be a terrorist with a gun, but the man with the portable computer in business class. In the last 15 years, pilots have reported well over 100 incidents that could have been caused by electromagnetic interference. The source of this interference remains unconfirmed, but increasingly, experts are pointing the blame at portable electronic devices such as portable computers, radio and cassette players and mobile telephones. RTCA, an organization which advises the aviation (航空) industry, has recommended that all airlines ban (禁止) such devices from being used during "critical" stages of light, particularly take-off and landing. Some experts have gone further, calling for a total ban during all flights. Currently, rules on using these devices are left up to individual airlines. And although some airlines prohibit passengers from using such equipment during take-off and landing, most are reluctant to enforce a total ban, given that many passengers want to work during flights. The difficulty is predicting how electromagnetic fields might affect an aircraft's computers. Experts know that portable devices emit radiation which affects those wavelengths which aircraft use for navigation and communication. But, because they have not been able to reproduce these effects in a laboratory, they have no way of knowing whether the interference might be dangerous or not. The fact that aircraft may be vulnerable (易受损的) to interference raises the risk that terrorists may use radio system in order to damage navigation equipment. As worrying, though, is the passenger who can't hear the instructions to turn off his radio because the music's too loud.

单选题Thirty-one million Americans are over 60 years of age, and twenty-nine million of them are healthy, busy, productive citizens. By the year 2030, one in every five people in the United States will be over 60. Elderly people are members of the fastest-growing minority in this country. Many call this the "graying of America". In 1973, a group called the "Gray Panthers" was organized. This group is made up of young and old citizens. They are trying to deal with the special problems of growing old in America. The Gray Panthers know that many elderly people have health problems: some cannot walk well, others cannot see or hear well. Some have financial problems; prices are going up so fast that the elderly can"t afford the food, clothing, and housing they need. Some old people are afraid and have safety problems. Others have emotional problems. Many elderly are lonely because of the death of a husband or a wife. The Gray Panthers know another fact, too. Elderly people want to be as independent as possible. So, the Gray Panthers are looking for ways to solve the special problems of the elderly. The president of the Gray Panthers is Maggie Kuhn, an active woman in her late 70s. She travels across the United States, educating both young and old about the concerns of elders. One of the problems she talks about is where and how elders live. She says that Americans do not encourage elders to live with younger people. As far as Maggie Kuhn is concerned, only elders who need constant medical care should be in nursing homes. Maggie Kuhn knows that elders need education, too. She spends lots of time talking to groups of older Americans. She encourages them to continue to live in their own houses if it is possible. She also tells them that it is important to live with younger people and to have children around them. This helps elders to stay young at heart.

单选题The judge remained {{U}}sober{{/U}} despite the lawyer's ludicrous attempt to prove the defendant's innocence. A. sad B. sorry C: serious D. surprised

单选题Why does the author suggest that the state should encourage public diversions?

单选题One of the interviewees mentioned in the passage ______.