单选题Although he was on a diet, the food ______ him enormously.

单选题Their air of cheerful self-sacrifice and endless complaisance won them undeserved praise, for their seeming gallantry was wholly motivated by a ______ wish to avoid confict of any sort. A. poignant B. sincere C. laudable D. cowardly

单选题You have been badly injured in a car accident. It is necessary to give you a blood transfusion because you lost a great deal of blood in the accident. However, special care must be taken in selecting new blood for you. If the blood is too different from your own, the transfusion could kill you. There are four basic types of blood; A, B, AB and O. A simple test can indicate a person's blood type. Everybody is born with one of these four types of blood. Blood type, like hair color and height, is inherited from parents. Because of substances contained in each type, the four groups must be transfused carefully. Basically, A and B cannot be mixed. A and B cannot receive AB, but AB may receive A or B. O can give to any other group, hence it is often called the universal donor. For the opposite reason, AB sometimes called the universal recipient. However, because so many reactions can occur in transfusions, patients usually receive only salt or plasma until their blood can be matched as exactly as possible in the blood bank of a hospital. In this way, it is possible to avoid any bad reactions to the transfusion. There is a relationship between your blood type and your nationality. Among Europeans and people of European ancestry, about 42 percent have type A while 45 percent have type O. The rarest is type AB. Other races have different percentages. For example, some American Indian groups have nearly 100 percent type O.

单选题What"s the language ______ in Germany?

单选题Out ______ after the class was over.

单选题He ______all his unfinished manuscripts to his colleagues in the laboratory before he went to France.

单选题The computer will be capable ______ whether Princeton will have sun or rain one month away.

单选题He suggested that we ______the children to the zoo.

单选题He might have been killed ______ the arrival of the police.

单选题This toothed whale has a large, square head with ______ the so-called spermaceti.

单选题________ the football match started than it began to rain cats and dogs.

单选题 Geothermal (地热的) energy has been used for thousands of years in some countries for cooking and heating. It is simply power derived from the Earth's internal heat. This thermal energy is contained in the rock and fluids beneath Earth's crust. It can be found from shallow ground to several miles below the surface, and even farther down to the extremely hot molten rock called magma (岩浆). A geothermal heat pump system can take advantage of the constant temperature of the upper ten feet (three meters) of the Earth's surface to heat a home in the winter while extracting heat from the building and transferring it back to the relatively cooler ground in the summer. Geothermal water from deeper in the Earth can be used directly for heating homes and offices, or for growing plants in greenhouses. Some US cities pipe geothermal hot water under roads and sidewalks to melt snow. To produce geothermal-generated electricity, well, sometimes a mile (1.6 kilometers) deep or more, are drilled into underground reservoirs to tap steam and very hot water that drive turbines linked to electricity generators. The first geothermally generated electricity was produced in Larderello, Italy, in 1904. There are three types of geothermal power plants: dry steam, flash, and binary (二元介质式). Dry steam, the oldest geothermal technology, takes steam out of fractures in the ground and uses it to directly drive a turbine. Flash plants pull deep, high-pressure hot water into cooler, low-pressure water. The steam that results from this process is used to drive the turbine. In binary plants, the hot water is passed by a secondary fluid with a much lower boiling point than water. This causes the secondary fluid to turn to vapor, which then drives a turbine. Most geothermal power plants in the future will be binary plants. There are many advantages of geothermal energy. It can be extracted without burning a fossil fuel such as coal, gas, or oil. Geothermal fields produce only about one-sixth of the carbon dioxide that a relatively clean natural-gas-fueled power plant produces. Unlike solar and wind energy, geothermal energy is always available, 365 days a year. It's also relatively inexpensive; savings from direct use can be as much as 80 percent over fossil fuels. But it has some environmental problems. The main concern is the release of hydrogen sulfide (硫化氢), a gas that smells like rotten eggs at low concentrations. Another concern is the disposal of some geothermal fluids, which may contain low levels of toxic materials. Although geothermal sites are capable of providing heat for many decades, eventually specific locations may cool down.

单选题My friend's son, who is a soldier, was delighted when he was ____ only a few miles from home.

单选题Cultural exchange plays an important role_______promoting relation between the twocountries. 

单选题I don"t believe him. He ______ be serious.

单选题Jean: Hello, Wilson, this is Jean. Listen, Wilson... Ted: ______

单选题The population of China is ______ than ______ of any other country in the world. A. larger, the one B. more, that C. larger, that D. more, the one

单选题下面的短文后列出了10个句子，请根据短文的内容对每个句子作出判断：如果该句提供的是正确信息，选择A；如果该句提供的是错误信息，选择B；如果该句的信息文中没有提及，选择C。在答题卡相应位置上将答案选项涂黑。Setting Effective Goals　　Avital Schweitzer, 17, is clearly goal directed.She works hard to achieve

单选题So far as the food industry is concerned, the processing of sheep and lambs is relatively ______ in the United States, accounting for only about 7 percent of meat-packing production.