[填空题]

Why might the earth become warmer

[填空题]Earth’s climate would surely become warmer and warmer.

[简答题]One might ask why speculation is permitted when there is so real a danger of loss. The basic reason is that speculation can perform useful functions in the market equilibrium and encourages faster entry of more suppliers, ff the price change lagged until after an actual commodity shortage had occurred, the fluctuation would probably be sharper and more sudden. Remedial supply action could not be further delayed. Similarly, if speculators foresee a surplus in some commodity, their selling of futures will help drive the price down to some extent before the surplus actually occurs. When speculators foresee a shortage and bid up the price, they are also helping to conserve the present supply. As the price goes up, less of the commodity is purchased; a rib in price encourages users to economize. Similarly, a lowering of price encourages users to buy more, thus helping to sell the surplus which is developing.

[单项选择]
The National Academy of Sciences claimed recently that people should caution rather than panic about the greenhouse effect. It is said that the greenhouse effect will result in global warming, which will elevate the earth’s temperature by 3～9 degrees Fahrenheit. The greenhouse effect results when carbon dioxide (CO₂) and certain other gases in the atmosphere allow the sun’s ultraviolet rays to penetrate and warm the earth, but then absorb the infrared energy the earth radiates back into space—much as glass in a greenhouse does—forming a kind of "thermal blanket" around the planet. The greenhouse effect will mean much more than hotter summers and milder winters. It may alter rainfall, affect crop yields and eventually—as glaciers begin to melt—raise the level of the seas. It had long been reported that the earth’s temperature would rise, melting the icecaps, raising the seas, flooding the land. Half of L
A. modify
B. raise
C. defend
D. collect

[填空题]
Why on earth would an innocent person falsely confess to committing a crime To most people, it just doesn’t seem logical. But it is logical, say experts, if you understand what can happen in a police interrogation (审讯) room.
Under the right conditions, people’s minds are susceptible (易受影响的) to influence, and the pressure put on suspects during police grillings (盘问) is enormous. (1) "The pressure is important to understand, because otherwise it’s impossible to understand why someone would say he did something he didn’t do. The answer is: to put an end to an uncomfortable situation that will continue until he does confess. "
Developmental psychologist Allison Redlich recently conducted a laboratory study to determine how likely people are to confess to things they didn’t do. (2) The researchers then intentionally crashed the computers and accused the participants of hitt