单选题In Saudi Arabia, a monarchy where conservative Islam prevails and no modified system of law exists, women"s mobility is strongly curtailed .

单选题When the Victorians had family reunions, the hosts______their way to entertain the guests.

单选题If it doesn"t rain within the next few weeks, the crops will have to be watered if they are______.

单选题This spacious room is______furnished with just a few articles in it.

单选题He had no______about his talents as a singer.

单选题Spring and all its blossoms are ephemeral here but a moment and then gone.

单选题Read the following passage and answer the questions that followed. Twice as many girls as boys are being born in some Arctic villages because of high levels of man-made chemicals in the blood of pregnant women, according to scientists from the Arctic Monitoring and Assessment Programme(Amap). The scientists, who say the findings could explain the recent excess of girl babies across much of the northern hemisphere, are widening their investigation across the most acutely affected communities in Russia, Greenland and Canada to try to discover the size of the imbalance in Inuit communities of the far north. In the communities of Greenland and eastern Russia monitored so far, the ratio was found to be two girls to one boy. In one village in Greenland only girls have been born. The scientists measured the man-made chemicals in women"s blood that mimic human hormones and concluded that they were capable of triggering changes in the sex of unborn children in the first three weeks of gestation. The chemicals are carried in the mother"s bloodstream through the placenta to the foetus, switching hormones to create girl children. Lars-Otto Reierson, executive secretary for Amap, said: " We knew that the levels of man-made chemicals were accumulating in the food chain, and that seals, whales and particularly polar bears were getting a dose a million times higher than that existing in plankton, and that this could be toxic to humans who ate these higher animals. What was shocking was that they were also able to change the sex of children before birth. The sex balance of the human race—historically a slight excess of boys over girls—has recently begun to change. A paper published in the US National Institute of Environmental Health Sciences earlier this year said that in Japan and the US there were 250,000 boys fewer than would have been expected had the sex ratio existing in 1970 remained unchanged. The paper was unable to pin down a cause for the new excess of girls over boys. The Arctic scientists have discovered that many of the babies born in Russia are premature and the boys are far smaller than girls. Possible links between the pollutants and high infant mortality in the first year of life is also being investigated. Scientists believe a number of man-made chemicals used in electrical equipment from generators, televisions and computers that mimic human hormones are implicated. They are carried by winds and rivers to the Arctic where they accumulate in the food chain and in the bloodstreams of the largely meat-and fish-eating Inuit communities. The first results of the survey were disclosed at a symposium of religious, scientific and environmental leaders in Greenland"s capital, Nuuk, yesterday, organized by the Patriarch of the Orthodox Church, Bartholomew I, which is looking at the effects of environmental pollution on the Arctic. Dr Reierson said the accumulation of DDT, PCBs, flame-retardants and other endocrine disrupters has been known for some time and young women had been advised to avoid eating some Arctic animals to avoid excess contamination and possible damage to their unborn children.Dr Reierson said blood samples from pregnant women were subsequently matched with the sex of their baby. Women with elevated levels of PCBs in their blood above two to four micrograms per litre and upwards were checked in three northern peninsula"s in Russia"s far east—the Kola, Taimyr and Chukotka—plus the Pechora River Basin. To check the results the survey was widened and further communities, including those on Commodore Island, were investigated. The results were now in for 480 families and the ratio remained the same. He said full results for the widening of the survey would not be published until next year but preliminary results for Greenland showed the same 2:1 ratio in the north. Aqqaluk Lynge, the former chairman of the Inuit Circumpolar Conference who hails from Greenland, said: "This is a disaster, especially for some 1 ,500 people who make up the Inuit nations in the far north east of Russia. " Here in the north of Greenland, in the villages near the Thule American base, only girl babies are being born to Inuit families. " The problem is acute in the north and east of Greenland where people still have the traditional diet. "This has become a critical question of people"s survival but few governments want to talk a-bout the problem of hormone mimickers because it means thinking about the chemicals you use. "I think they need to be tested much more stringendy before they are allowed on the market. "

单选题All of us would have enjoyed the party much more if there ______ quite such a crowd of people there. A. weren't B. hasn't been C. hadn't been D. will need

单选题The Chinese version of Meetic is planning to {{U}}screen{{/U}} its customers by imposing a relatively high membership charge. A. enlarge the number of B. prevent from swarming in C. examine closely D. adopt selectively

单选题The notion that a parasite can alter the behavior of a host organism is not mere fiction; indeed, the phenomenon is not even ______. A. observable B. real C. comprehended D. rare

单选题To my mind, Mark Twain was ______the large man of his time.

单选题Dissatisfaction (with) the economic relationships (of) industrialized and less industrialized countries led to proposals (for) environmental (trade-offs).

单选题Trends in new product development in the U. S. (largely) mirrored those in Europe, (with) low-fat introduction continuing, (although) at a (reducing) rate.

单选题A form of biological pest control is to include various plants in a garden or field that are known naturally to ______ parasitic pests that are known to bring disease and destruction.

单选题In the past eight years, IKEA only opened three outlets, while its rival B＆Q shops are {{U}}sprouting{{/U}} everywhere. A. emerging B. flourishing C. developing D. prospering

单选题The couple departed ______ a heavy rain.

单选题Psychology has slowly evolved into an ______ scientific discipline that now functions autonomously with the same privileges and responsibilities as other sciences.

单选题Alexander Graham Bell invented______telephone in 1876.

单选题Modern technology and science have produced a wealth of new materials and new ways of using old materials. For the artist this means wider opportunities. There is no doubt that the limitations of materials and nature of tools both restrict and shape a man"s work. Observe how the development of plastics and light metals along with new methods of welding has changed the direction of sculpture. Transparent plastic materials allow one to look through an object, to see its various sides superimposed on each other (as in Cubism or in an X-ray). Today, welding is as prevalent as casting was in the past. This new method encourages open designs, where surrounding and intervening space becomes as important as form itself. More ambiguous than other scientific inventions familiar to modern artists, but no less influential , are the psychoanalytic studies of Freud and his followers, discoveries that have infiltrated recent art, especially Surrealism. The Surrealists, in their struggle to escape the monotony and frustrations of everyday life, claimed that dreams were the only hope. Turning to the irrational world of their unconscious, they banished all time barriers and moral judgements to combine disconnected dream experiences from the past, present and intervening psychological states. The Surrealists were concerned with overlapping emotions more than with overlapping forms. Their paintings often become segmented capsules of associative experiences. For them, obsessive and often unrelated images replaced the direct emotional message of expressionism. They did not need to smash paint and canvas; they went beyond this to smash the whole continuity of logical thought. There is little doubt that contemporary art has taken much from contemporary life. In a period when science has made revolutionary strides, artists in their studios have not been unaware of scientists in their laboratories. But this has rarely been a one-way street. Painters and sculptors, through admittedly influenced by modern science, have also molded and changed our world. If break-up has been a vital part of their expression, it has not always been a symbol of destruction. Quite the contrary : it has been used to examine more fully, to penetrate more deeply, to analyze more thoroughly , to enlarge, isolate and make more familiar certain aspects of lire that earlier we were apt to neglect. In addition, it sometimes provides rich multiple experiences so organized as not merely to reflect our world, but in fact to interpret it.

单选题It is absolutely imperative that governments of all levels______on this issue in spite of some difficulties.