The WHO says there is currently no evidence of human-to-human ______ of the virus.

单选题

The WHO says there is currently no evidence of human-to-human ______ of the virus.

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材料题

共用题干AIDSThe World Health Organization(WHO)says as many as 10 million persons worldwidemay have the virus that causes AIDS（艾滋病）.Experts believe about 350, 000 personshave the disease.And one million more may get it in the next five years. In the UnitedStates,about 50,000 persons have died with AIDS.The countrys top medical official says more than 90 percent of all Americans who had the AIDS virus five years ago are dead.There is no cure for AIDS and no vaccine（疫苗）or medicine to prevent it. Howeve

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材料题

140 Davis Street,22 the street from a small park．Their house is just off the main road．George usually goes to work by bus, but sometimes he goes 23 his car．The children usually go to school by bus． The Glenns house is 24 hidden among the trees．It has small bushes (灌木) planted around it．There is a fence 25 it and the house next door．It is a two-storey house, 26 the living room,dining room and kitchen(厨房) on the first floor,and the bedrooms and bathroom on the second floor． The Glenns spend a lot

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单选题

the messages. ”I play the messages 12 hours a day. I hear the same voices 60 times a day. It makes me crazy,” says Atnis, a 45-year-old cabdriver.“But if I don’t play the messages, I get fined 100 dollars.” A lot of passengers complained, too. “It’s too much noise,” says a passenger, “I asked the driver to turn off the message, but he said he can’t.” Other people think the voices are a great idea. One taxi driver says,” People like to hear the famous voices, and they put on their seat belts mor

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单选题

the start of the day,we have all been told,and told again,is as necessary as putting gasoline in the family car before starting a trip.But for many people the thought of food first thing in the morning is by no means a pleasure.So despite all the efforts,they still take no breakfast.Between 1977 and 1983,the latest year for which figures are available,the number of people who didn’t have breakfast,increased by 33 percent.For those who feel pain of guilt about not eating breakfast,however,there

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