单选题Peter was seen crying when he came out of the office. We can deduce that he must have been punished.

单选题Obviously, the word "arrangement" underlined in the third paragraph refers to the fact that ______.

单选题Proper lighting is a necessary for good eyesight even though human night vision can be temporarily impaired by extreme flashes of light.

单选题The possibilities for______energy sources, including solar power, wind power, geothermal power, water power and even nuclear energy promise greatly to the earthlings.

单选题She once again went through her composition carefully to ______ all spelling mistakes from it. A. eliminate B. withdraw C. diminish D. delete

单选题When workers are organized in trade unions, employers find it hard to lay them ______. A. off B. aside C. out D. down

单选题An overwhelming richness of vegetation may have caused the level of oxygen, to rise above today"s ______ , with a corresponding depletion of carbon dioxide.

单选题Scientists have claims that there is a ______ of wildlife in the Amazon Rain Forest, and that species which have not lived in the area for most centuries are once again being sighted. A. resurgence B. rectification C. recreation D. recover

单选题It is not easy to remain tranquil when events suddenly change your life. A. calm B. upset C. steady D. severe

单选题{{U}}Deceptively{{/U}} simple in design, the sculptural works of this monument incorporate a broad range of textures, sizes, and contours.

单选题"We"re not bringing in millions of dollars," says a director of development. "But we want to make sure the demand is there before we act to the project."

单选题Although many modifications have been made in it, the game known in the United States as football can be traced directly to the English game of rugby. A. rules B. changes C. demands D. leagues

单选题We are delighted to {{U}}establish{{/U}} business relationship with you.

单选题The ancient Jewish people regarded themselves as the salt of the earth , the chosen few by God to rule the world.

单选题It is difficult to {{U}}refute{{/U}} his argument in our routine debate.

单选题Consumers and producers obviously make decisions that mold the economy, but there is a third major 41 to consider the role of government. Government has a powerful 42 on the economy in at least four ways: Direct Services. The postal system, for example, is a federal system 43 the entire nation, as is the large and complex establishment. Conversely, the construction and 44 of most highways the 45 of the individual states, and the public educational systems, despite a large funding role by the federal government, are primarily 46 for by country or city governments. Police and fire protection and sanitation 47 are also the responsibilities of local government. Regulation and Control. The government regulates and controls private 48 in many ways, for the 49 of assuring that business serves the best 50 of the people as a whole. Regulation is necessary in areas where private enterprise is granted a 51 , such as in telephone or electric service. Public policy permits such companies to make a reasonable 52 , but limits their ability to raise prices 53 , since the public depends on their services. Often control is 54 to protect the public, as for example, when the Food and Drug Administration bans harmful drugs, or requires standards of 55 in food. In other industries, government sets guidelines to ensure fair competition without using direct control. Stabilization and Growth. Branches of government, including Congress and such entities as the Federal Reserve Board. attempt to control the extremes of boom and bust, of inflation and depression, by 56 tax rates, the money supply, and the use of credit. They can also 57 the economy through changes in the amount of public spending by the government itself. Direct Assistance. The government provides many kinds of help to 58 and individuals. For example, tariffs 59 certain products to remain relatively free of foreign competition; imports are sometimes taxed so that American products are able to 60 better with certain foreign goods. In quite a different area, government supports individuals who cannot adequately care for themselves, by making grants to working parents with dependent children, by providing medical care For the aged and the indigent, and through social welfare system.

单选题In the 1400s, artists often created their own pigments by pulverizing semiprecious stones.

单选题Americans who consider themselves ______ in the traditional sense do not usually hesitate to heap criticism in domestic matters over what they believe is oppressive or wasteful. A. pedestrian B. penchant C. patriotic D. patriarch

单选题Kagan maintains that an infant"s reactions to its first stressful experiences are part of a natural process of development, not harbingers of childhood unhappiness or ______ signs of adolescent anxiety.

单选题Although most of us think of the brain as a single {{U}}framework{{/U}}, it is actually divided into two halves.