单选题The United States incurs world-wide condemnation because it______ the international law of non-interference in the internal affairs of other countries.

单选题Despite his disappointing record this year, I ______ feel he is the best man in our team. A. therefore B. otherwise C. moreover D. nonetheless

单选题Kunming is usually cool in the summer, but Shanghai ______.

单选题His past affection for Jane ______ any new relationship impossible for him. A. resented B. rendered C. repelled D. resorted

单选题While some office jobs would seem ______ to many people, there are quite a few jobs that are stimulating, exciting and satisfying.

单选题{{B}}Text 1{{/B}} A study by scientists in Finland has found that mobile phone radiation can cause changes in human cells that might affect the brain, the leader of the research team said. But Darius Leszczynski, who headed the 2-year study and will present findings next week at a conference in Quebec (魁北克), said more research was needed to determine the seriousness of the changes and their impact on the brain or the body. The study at Finland's Radiation and Nuclear Safety Authority found that exposure to radiation from mobile phones can cause increased activity in hundreds of proteins in human cells grown in a laboratory, he said. "We know that there is some biological response. We can detect it with our very sensitive approaches, but we do not know whether it can have any physiological effects on the human brain or human body," Leszczynski said. Nonetheless, the study, the initial findings of which were published last month in the scientific journal Differentiation, raises new questions about whether mobile phone radiation can weaken the brain's protective shield against harmful substances. The Study focused on changes in cells that line blood vessels and on whether such changes could weaken the functioning of the blood-brain barrier, which prevents potentially harmful substances from entering the brain from the bloodstream, Leszczynski said. The study found that a protein called hsp27 linked to the functioning of the blood-brain barrier showed increased activity due to irradiation and pointed to a possibility that such activity could make the shield more permeable(能透过的), he said. "Increased protein activity might cause cells to shrink—not the blood vessels but the cells themselves—and then tiny gaps could appear between those cells through which some molecules could pass," he said. Leszczynski declined to speculate on what kind of health risks that could pose, but said a French study indicated that headache, fatigue and sleep disorders could result. "These are not life-threatening problems but can cause a lot of discomfort," he said, adding that a Swedish group had also suggested a possible link with Alzheimer's disease. "Where the truth is, I do not know," he said. Leszczynski said that he, his wife and children use mobile phones', and he said that he did not think his study suggested any need for new restrictions on mobile phone use.

单选题One of the biggest______to the economic reform of this area has been the lack of access to international markets.

单选题Admiral Cervera knew he was being ordered to certain destruction but felt compelled to obey. He chose the morning of July 3 for a gallant escape attempt.

单选题Those guys are continually quarrelling, but it is usually a storm in a teacup.

单选题With a wave of his hand, the magician made the duck ______.(2005年电子科技大学考博试题)

单选题These features are______ of what we may call educated informal English.

单选题The fall in demand for coffee could cause a ______in the market, forcing some producers to cut prices. A. dole B. sonar C. melee D. glut

单选题4 Next to Sir Andrew in the club-room sits Captain Sentry, a gentleman of great cour age, good understanding, but invincible modesty. He is one of those that deserve very well, but are very awkward at putting their talents within the observation of such as should take notice of them. He was some years a captain, and behaved himself with great gallantry in several engagements and at several sieges; but having a small estate of his own, and being next heir to Sir Roger, he has quitted a way of life in which no man can rise suitably to his merit, who is not something of a courtier as well as a soldier. I have heard him often lament that in a profession where merit is placed in so conspicuous a view, impudence should get the better of modesty. When he had talked to this purpose; I never heard him make a sour expression, but frankly confess that he left the world because he was not fit for it. A strict honesty, and an even regular behavior, are in themselves obsta cles to him that must press through crowds, who endeavour at the same end with himself, the favor of a commander. He will, however, in his way of talk excuse generals for not disposing according to men's desert, or inquiring into it; for, says he, that the great man who has a mind to help me, has as many, to break through to come at me, as I have to come at him: therefore he will conclude that the man who would make a figure, especially in a military way, must get over all false modesty, and assist his patron against the impor tunity of other pretenders, by a proper assurance in his own vindication. He says it is a civil cowardice to be backward in asserting what you ought to expect, as it is a military fear to be slow in attacking when it is your duty. With this eandour does the gentleman speak of himself and others. The same frankness runs through all his conversation. The military part of his life has furnished him with many adventures, in the relation of which he is very agreeable to the company; for he is never overbearing, though accustomed to command men in the utmost degree below him; nor ever too obsequious, from a habit of obeying men highly above him.

单选题In the long run a government will always encroach upon freedom to the extent to which it has the power to do so. This is almost a natural law of politics, since, whatever the intentions of the men who exercise political power, the sheer momentum of government leads to a constant pressure upon the liberties of the citizen. But in many countries society has responded by throwing up its own defenses in the shape of social classes or organized corporations which, enjoying economic power and popular support, have been able to set limits to the scope of action of the executive. Such, for example, in England was the origin of all our liberties--won from government by the stand first of the feudal nobility, then of churches and political parties, and latterly of trade unions, commercial organizations, and the societies for promoting various causes. Even in European lands which were arbitrarily ruled, the powers of the monarchy, though absolute in theory, were in their exercise. checked in a similar fashion. Indeed the fascist dictatorships of today are the first truly tyrannical governments which western Europe has known for centuries, and they have been rendered possible only because on coming to power they destroyed all forms of social organization which were in any way rivals to the state.

单选题So if you notice a slight worsening of symptoms after taking a remedy, this is a sign that the medicine is working and you should simply stop dosing until this ______ dies down.

单选题She was so obstinate that she wouldn' t adjust her opinions.

单选题In 1984, President Ronald Reagan proposed that the United States construct a launch laboratory for a new era of space exploration.

单选题The phrase "raising the hackles of…" (in boldface in Paragraph 3) most probably means ______.

单选题Psychologists have recently mounted an offensive against what they describe as Unastiness/U toward students by educators.

单选题The ship was ______ in a storm of Jamaica. A. drowned B. immerged C. wrecked D. submitted