单选题Tom: It’s cloudy outside. Please take an umbrella.Mike: ________ .

单选题The economic costs of noise are several. Airports are currently operating at less than 27 because of noise regulations which restrict their hours of operation. For instance, at Washington's National Airport no jet traffic is allowed from 11 p.m. to 7 a.m. Other airports restrict the use ofcertain runway. One estimate is that noise 28 reduce possible airport use by 20 percent. The 29 cargo trade is especially affected by night restrictions. In the case of airports, jet engines may be 30 to reduce their noise level, or insulation from air traffic noise may be provided by the purchase of land around airports or the insulation of buildings. One estimate is that $5.7 billion would be required to 31 all existing jet engines with noise control devices. However, 32 the current state of the art, even taking this step will not reduce noise levels at all points to 33 values. Some combination of methods is probably necessary. If all aircraft were made quieter by existing methods, there would be a number of economic benefits. An increase in airport capacity would 34 . Property values near airports might rise. Transportation costs to and from airports could be reduced since the airports now could be located closer to population center. Much research still needs to be done on the economic 35 of noise reduction and noise effects. Although some of the effects of noise pollution are known, more must be discovered about its effects on health, productivity, property values and the quality of life. 36 , the cost of noise pollution control to the economy as a whole needs to be investigated. A．identification B．equip C．profitable D．capacity E．pollution F．restrictions G．transformed H．significant I．Furthermore J．acceptable K．modified L．Accordingly M．considering N．occur O．aspects

单选题In order to buy her a house she had to get a ______from the bank she likes.

单选题One of the prominent characteristics of a law is______ .

单选题When the colonel learned that headquarters had been unable to send him reinforcements, he ______ the order for the scheduled attack.

单选题Is there anything else ______ you want to get ready for the party this evening?

单选题Go back to your room and leave me ______.

单选题A laser beam is used to ______even the hardest substance.

单选题My favorite radio song is the one I first heard on a thick 1923 Edison disc I ______ at a garage sale.

单选题According to the author, babies learn to do things which ______.

单选题As ordinary people, scientists are by no means more honest or ______ than other people, but as scientists, they attach special value to honesty while they are in their working sphere. A. ethical B. ethnic C. aesthetic D. esthetic

单选题The issue of the movie is displayed around ______.

单选题Not only ______ very well, but also ______ well.

单选题Before you can fly a plane in the sky you have to learn the ______ of flying it.

单选题Reebok executives do not like to hear their stylish athletic shoes called "footwear for yuppies (雅皮士，少壮高薪职业人士)". They contend that Reebok shoes appeal to diverse market segments, especially now that the company offers basketball and children"s shoes for the under-18 set and walking shoes for older customers not interested in aerobics (健身操) or running. The executives also point out that through recent acquisitions they have added hiking boots, dress and casual shoes, and high-performance athletic footwear to their product lines, all of which should attract new and varied groups of customers. Still, despite its emphasis on new markets, Reebok plans few changes in the upmarket (高档消费人群的) retailing network that helped push sales to $ 1 billion annually, ahead of all other sports shoe marketers. Reebok shoes, which are priced from $27 to $85, will continue to be sold only in better specialty, sporting goods, and department stores, in accordance with the company"s view that consumers judge the quality of the brand by the quality of its distribution. In the past few years, the Massachusetts-based company has imposed limits on the number of its distributors (and the number of shoes supplied to stores) , partly out of necessity. At times the unexpected demand for Reebok"s exceeded supply, and the company could barely keep up with orders from the dealers it already had. These fulfillment problems seem to be distribution now, but the company is still selective about its distributors. At present, Reebok shoes are available in about five thousand retail stores in the United States. Reebok has already anticipated that walking shoes will be the next fitness-related craze, replacing aerobics shoes the same way its brightly colored, soft leather exercise footwear replaced conventional running shoes. Through product diversification and careful market research, Reebok hopes to avoid the distribution problems Nike came across several years ago, when Nike misjudged the strength of the aerobics shoe craze and was forced to unload huge inventories of running shoes through discount stores. (355 words)

单选题It has been estimated that the earth's surface temperature has increased ______one quarter to three fourths of a degree since 1850.

单选题He (looked) (a little bit) nervous, (that) could be seen from his (facial expression).

单选题—______are you trying to prove to the police? —Where I was last night.

单选题He never ( ) to his customers in his business except occasionally for some special reasons. This time he cut the price by half, which really shocked me.

单选题If you call the 911 emergency number, they will ______ firemen, policemen, and paramedics immediately.