单选题A small number of firms have ceased trading.A. completedB. finishedC. fulfilledD. stopped

单选题That guy is {{U}}intelligeng{{/U}} but a bit dull.

单选题{{U}}Practically{{/U}} all animals communicate through sounds.

单选题Rodman met with Tony to try to settle the dispute over his contract.

单选题In the last sentence of the second paragraph, the word “islands” refers to

单选题The plane was fatally crippled when the rear cargo door was pulled off in flight.

单选题If wool is submerged in hot water, it tends to shrink. A．smell B．fade C．unravel D．contract

单选题He ceaselessly interrupted me by asking many irrelevant questions.

单选题Einstein"s Theory of Relativity was so profound that only a few scientists could understand it.

单选题He has a very outgoing personality and it is easy for him to makes friends.A. abilityB. characterC. realityD. attitude

单选题These programmes are of {{U}}enormous{{/U}} value to old people. A. natural B. fatal C. tiny D. immense

单选题The high-speed trains can have a major impact on travel preferences

单选题The room was furnished with the simplest essentials, a bed, a chair, and a table.

单选题Mary just told us a very fascinating story.

单选题World Crude Oil Production may Peak a Decade Earlier Than Some Predict In a finding that may speed efforts to conserve oil, scientists in Kuwait predict that world conventional crude oil production will peak in 2014. This prediction is almost a decade earlier than some other predictions. Their study is in ACS" Energy Fuels. Ibrahim Nashawi and colleagues point out that rapid growth in global oil consumption has sparked a growing interest in predicting "peak oil". "Peak oil" is the point where oil production reaches a maximum and then declines. Scientists have developed several models to forecast this point, and some put the date at 2020 or later. One of the most famous forecast models is called the Hubbert model. It assumes that global oil production will follow a bell shaped curve, a related concept is that of "Peak Oil". The term "Peak Oil" indicates the moment in which world wide production will peak, afterwards to start on irreversible decline. The Hubbert model accurately predicted that oil production would peak in the United States in 1970. The model has since gained in popularity and has been used to forecast oil production worldwide. However, recent studies show that the model is insufficient to account for more complex oil production cycles of some countries. Those cycles can be heavily influenced by technology changes, politics, and other factors, the scientists say. The new study describes development of a new version of the Hubbert model that provides a more realistic and accurate oil production forecast. Using the new model, the scientists evaluated the oil production trends of 47 major oil-producing countries, which supply most of the world"s conventional crude oil. They estimated that worldwide conventional crude oil production will peak in 2014, years earlier than anticipated. The scientists also showed that the world"s oil reserves are being reduced at a rate of 2.1 percent a year. The new model could help inform energy, which related decisions and public policy debate, they suggest.

单选题Safety is always our primary concern.A. leastB. secondaryC. lastD. chief

单选题Every new venture has the possibility of making or losing money.

单选题A Thirsty World The world is not only hungry; it is also thirsty for water. This seems strange to you, since nearly 75% of the earth's surface is covered with water. But about 97% of this huge amount is from sea-water, or salt water. Man can only drink and use the other 3%—the fresh water that comes from rivers, lakes, underground, and other sources. And we cannot even use all of that, because some of it is in the form of iceberg (冰山) and glaciers (冰川). Even worse, some of it has been polluted. At the moment, this small amount of fresh water is still enough for us. However, our need for water is increasing rapidly. Only if we take steps to deal with this problem now can we avoid a severe worldwide water shortage later on. A limited water supply would have a bad effect on agriculture and industry. In addition to stopping wasting our precious water, one useful step we should take is to develop ways of reusing it. Experiments have already been done in this field, but only on a small scale. Today, in most large cities tanks, water is used only once and it eventually returns to the sea or runs into underground storage tanks. But it is possible to pipe water that has been used to a purifying (净化) plant. There it can be filtered (过滤) and treated with chemicals so that it can be used again just as it were fresh from a spring. But even if every large city purified and reused its water, we still would not have enough. Where could we turn next? To the oceans! All we'd have to do to make use of the vast amount of sea-water is—remove the salt. This salt-removing process is already in use in many parts of the world.

单选题He was tempted by the high salary offered by the company.

单选题The council meeting terminated at 2 o’clock