单选题. Questions 12 to 15 are based on the conversation you have just heard.5.

单选题. Questions 8 to 11 are based on the conversation you have just heard.1.

单选题Mounting evidence shows that behavioral-activation BA therapy is just as effective as cognitive-behavioral therapy CBT in treating depression.Unlike CBT，BA is an outside-in 26_____ in which therapis

单选题The American Psychological Association APA warns that the loneliness epidemic now represents a threat to public health that exceeds that of obesity.Before getting into the specifics，we need to have a

单选题. You might think a little global warming is good for farming. Longer, warmer growing seasons and more carbon dioxide (CO2)—what plant wouldn't love that? The agricultural industry basically agrees on that. But global warming's effects on agriculture would actually be quite complicated—and mostly not for the better. It's true that some crops will prosper on a warmer planet, but the key word there is "some." According to a government report, higher CO2 levels and longer growing seasons will increase yields for fruit growers in the Great Lakes region. But many major American crops already use CO2 so efficiently that more of it probably won't make much difference to them. What will make a difference are all the other things we'll have more of as temperatures rise—namely droughts (干旱), bugs and big storms. More droughts mean lower crop yields. Melting snow in the Western U.S. will increase water availability in spring but decrease, it in summer, forcing farmers to change cropping practices. As insects that eat crops adapt their migration patterns to our warmer climate, farmers will have to either use more insecticide or plant hardier crops. Farmers on both coasts are already starting to reap some of what the nation's fossil-fuel addiction has sown. Crops in those regions require a certain number of colder days, or "winter chill." before they break dormancy (冬眠) and begin flowering. Too few cold days breaks the plants' flowering schedule which in turn affects pollination (授粉) and hurts yield. So, given how much is at stake for them, how are farm states working to shape climate legislation? In response to agricultural demands, the Waxman-Markey bill frees the agricultural industry from CO2 emission limits and gives up control over what activities guarantee carbon offset credit to the Agricultural Department. Some farmers—and some farm state congressional leaders—have argued that because plants convert CO2 into oxygen, agricultural lands store more CO2 than they emit. This is only theoretically true. What we can say with certainty is that, like most big industries, farming is fossil-fuel intensive—large quantities of CO2 are emitted from farm equipment such as irrigation pumps and tractors.1. Under the influence of global warming, the yields of American crops will ______.

单选题. Questions 3 and 4 are based on the news report you have just heard.3.

单选题《复合题被拆开情况》 At school our children are taught to add up and subtract but, extraordinarily, are not shown how to open a bank account—let alone how to manage their finances in an increasingly complex and

单选题. The American economic system is organized around a basically private-enterprise, market-oriented economy in which consumers largely determine what shall be produced by spending their money in the marketplace for those goods and services that they want most. Private businessmen, striving to make profits, produce these goods and services in competition with other businessmen; and the profit motive, operating under competitive pressures, largely determines how these goods and services are produced. Thus, in the American economic system it is the demand of individual consumers, coupled with the desire of businessmen to maximize profits and the desire of individuals to maximize their incomes, that together determine what shall be produced and how resources are used to produce it. An important factor in a market-oriented economy is the mechanism by which consumer demands can be expressed and responded to by producers. In the American economy, this mechanism is provided by a price system, a process in which prices rise and fall in response to relative demands of consumers and supplies offered by seller-producers. If the product is in short supply relative to the demand, the price will be bid up and some consumers will be eliminated from the market. If, on the other hand, producing more of a commodity results in reducing its cost, this will tend to increase the supply offered by seller-producers, which in turn will lower the price and permit more consumers to buy the product. Thus, price is the regulating mechanism in the American economic system. The important factor in a private-enterprise economy is that individuals are allowed to own productive resources (private property), and they are permitted to hire labor, gain control over natural resources, and produce goods and services for sale at a profit. In the American economy, the concept of private property embraces not only the ownership of productive resources but also certain rights, including the right to determine the price of a product or to make a free contract with another private individual.11. In Line 7, Para. 1, "the desire of individuals to maximize their incomes" means ______.

单选题. Questions 5 to 7 are based on the news report you have just heard.5.

单选题《复合题被拆开情况》 Health workers who are HIV positive are banned from performing most surgery or dental treatment in case they cut themselves with their instruments and infect patients with their blood. They

单选题. Questions 12 to 15 are based on the conversation you have just heard.5.

单选题A third of the planets land is severely degraded and fertile soil is being lost at the rate of 24bn tonnes a year，according to a new United Nations-backed study that calls for a shift away from d

单选题《复合题被拆开情况》 Boredom has, paradoxically, become quite interesting to academics lately. In early May, London’s Boring Conference celebrated seven years of delighting in dullness. At this event, people fl

单选题《复合题被拆开情况》 In this age of Internet chat, videogames and reality television, there is no shortage of mindless activities to keep a child occupied. Yet, despite the competition, my 8-year-old daughter R

单选题. Questions 3 and 4 are based on the news report you have just heard.3.

单选题《复合题被拆开情况》 Time is running out for governments to overhaul regulation of global banks that have become bigger and more powerful since the start of the financial meltdown three years ago, the Internati