Citizens use blogs to present their views on _______ such as crime and politics.

A . Create a /var/adm/cron/at.allow file with no entries B . Create a /var/adm/cron/at.deny file with ’*’ as the only entry C . Create a /var/adm/at/at.deny file with ’ALL’ as the only entry D . Create a /var/adm/at/at.allow file with ’NONE’ as the only entry

A . consistent B . continual C . continuous D . numerou

A . 1242 B . 1258 C . 1265 D . 1266

A . himself B . themselves C . them D . themself

A . A．含量的变化与血中HBVDNA的含量成正比 B . B．抗-PreS1和抗-PreS2常见于急性乙型肝炎恢复的早期 C . C．其检出可以提示病毒正在或者已经被清除 D . D．可作为病毒复制的指标 E . E．与病毒的活动性复制无关

A.Nouns show action B.Nouns are informal. C.Verbs show action D.Verbs are informal.

A．too much, digest B．not much, digest C．too little.be digested D．not much.be digested

During the 20th century, sea level rose 8-12 inches. As a result. Tuvalu has experienced lowland flooding of salt water which has polluted the country's drinking water. Paani Laupepa, a Tuvaluan government official, reported to the Earth Policy Institute that the nation suffered an unusually high number of fierce storms in the past ten years. Many scientists connect higher surface water temperatures resulting from global warming to greater and more damaging storms. Laupepa expressed dissatisfaction with the United States for refusing to sign the Kyoto Protocol, an iuternationa] agreement calling for industrialized nations to reduce their greenhouse gas emissions (导致温室效应的气体排放), which are a main cause of global warming. "By refusing to sign the agreement, the US has effectively taken away the freedom of future generations of Tuvaluans to live where their forefathers have lived for thousands of years," Laupepa told the BBC. Tuvalu has asked Australia and New Zealand to allow the gradual move of its people to both countries. Tuvalu is not the only country that is vulnerable (易受影响的)to rising sea levels. Maumoon Gayoon, president of the Maldives, told the United Nations that global warming has made his country of 311,000 an "endangered nation". The text is mainly about ______. A．rapid changes in earth's temperature B．bad effects of global warming C．moving of a country to a new place D．reasons for lowland flooding

A．Y B．N C．NG

A．encouraged B．enforced C．expected D．entitled

22. Determining causes and effects is usually thought-provoking and quite complex. One reason for this is that there are two types of causes: immediate causes, which are readily apparent because they are closest to the effect, and ultimate cause, which, being somewhat removed, are not so apparent and perhaps even hidden. Furthermore, ultimate causes may bring about effects which themselves become immediate causes, this creating a causal chain. For example, consider the following causal chain. Sally, a computer salesperson, prepared extensively for a meeting with an important client (ultimate cause), impressed the client (immediate cause), and made a very large sale (effect). The chain did not stop there: The large sale cause her to be promoted by her employer (effect). A second reason why causal analysis can be so complex is that an effect may have any number of possible or actual causes, and a cause may have any number of possible or actual effects. 23. An upset stomach may be caused by eating spoiled food, but it may also be caused by overeating, flu, allergy, nervousness, pregnancy, or any combination of factors. Similarly, the high cost of electricity may have multiple effects: higher profits for utility companies, fewer sales of electrical appliances, higher prices for other products, and the development of alternative sources of energy. Sound reasoning and logic are central to any causal analysis. Writers of believable causal analysis examine their material objectively and develop their essays carefully. They are convinced by their own examination of the material, but are not afraid to admit other possible causes and effects. Because people are accustomed to thinking of causes with their effects, they sometimes commit an error in logic known as the "after this, therefore because of this" fallacy. 24. This fallacy leads people to believe that because one event occurred after another event, the first event somehow caused the second. That is, they sometimes make causal connection that are not proved. For example, if students began to perform. better after a free breakfast program was instituted at their school, one could not assume that the improvement was caused by the breakfast program. There could of course be any number of other causes for this effect, and a responsible writer on the subject would analyze and consider them all before suggesting the cause. (21)

A．subject B．object C．exposed D．dependent

A:high officials; B:professors; C:old people; D:president

A．在我的博客上写文章是我最喜欢做的事 B．写博客是我喜欢做的事之一 C．博客更文是有趣的事 D．我喜欢写博客