1、大学英语四级模拟试卷 109（无答案）一、Part I Writing (30 minutes)1 1. Current situations in the universities on compulsory courses and optional courses.2. Reasons of having more optional courses.3. Your answer to the question. 二、Part II Reading Comprehension (Skimming and Scanning) (15 minutes)Directions: In this pa
2、rt, you will have 15 minutes to go over the passage quickly and answer the questions attached to the passage. For questions 1-7, mark：Y (for YES) if the statement agrees with the information given in the passage;N (for NO) if the statement contradicts the information given in the passage;NG (for NOT
3、 GIVEN) if the information is not given in the passage.2 AlcoholismIn the Unite States alone, alcoholism affects millions of people and costs the country billions of dollars each year.What is Alcoholism?People who drink regularly enough to affect their family or work responsibilities and who drink i
4、n a way that puts them in dangerous situations are said to abuse alcohol. Although they use alcohol in an unhealthy way, people who suffer from alcohol abuse do not necessarily develop a physical dependence upon alcohol.Alcoholics, on the other hand, have a chronic disease. They are physically depen
5、dent upon alcohol. They feel a need to drink, almost in the same way that most people feel the need to eat. And once alcoholics start drinking, they are unable to stop. They develop a tolerance to alcohol, requiring more and more drinks to feel the same effects. When an alcoholic tries to cut down o
6、r stop drinking, he or she experiences the symptoms of withdrawal: sweating, nausea, shakiness, anxiety and delirium tremens (震颤性谵妄).More than 17 million Americans abuse alcohol or are alcoholics. Alcoholism affects men more than women: About 10 percent of men, compared to 3 to 5 percent of women, b
7、ecause alcoholics over the course of their lifetime. Alcoholism is more prevalent among youngster people than among older people.How Does Someone Become an Alcoholic?Why is it that some people can drink socially and not become addicted while others become alcoholics? The reason has to do with a comb
8、ination of genetic, physiological, psychological and social factors.Genes may be an important factor triggering the development of alcoholism. Researchers has indicated that children of alcoholics arc four times more likely to become alcoholics themselves; and while this statistic is at least partly
9、 due to environmental factors, scientists have determined that there is a genetic link.Physiologically, alcohol alters the balance of chemicals in the brain. It affects chemicals in the brains reward center. The body eventually craves alcohol to restore pleasurable feelings and avoid negative feelin
10、gs. People who already suffer from high stress or psychological problems such as low self-esteem and depression are at higher risk for developing alcoholism.Social factors such as peer pressure, advertising and environment also play an important role in the development of alcoholism. Young people of
11、ten start drinking because their friends are doing so. Beer and liquor ads on television tend to portray drinking as a glamorous, exciting pastime.What Happens When You Drink?When you take a drink, about 20 percent of the alcohol is absorbed in your stomach; the remaining 80 percent is absorbed in y
12、our small intestine. How quickly the alcohol is absorbed depends upon, the concentration of the alcohol in the drink and whether youve just eaten a big meal. A full stomach will stow down alcohol absorption.After the alcohol is absorbed, it caters your bloodstream and is carried throughout your body
13、. As the alcohol acts upon the body, the body is simultaneously working to remove it. The kidneys and lungs remove about 10 percent of the alcohol in the urine and the breath. The liver breaks down the rest of the alcohol into acetic acid (醋酸).After just a few drinks, the physical effects of alcohol
14、 become apparent. These effects are related to the blood alcohol concentration (BAC). The BAC goes up when the body is taking in alcohol faster than it can release it.Alcohol and the BrainAlcohol affects brain chemistry by altering levels of neurotransmitters (精神传递素), Neurotransmitters are chemical
15、messengers that transmit the signals throughout the body that control thought processes, behavior and emotions.In the short term, alcohol can cause blackoutsshort-term memory lapses in which people forget what occurred over entire stretches of time. The long-term effects on the brain can be even mor
16、e damaging.Long-term drinking can leave permanent damage, causing the brain to shrink and leading to deficiencies in the fibers that carry information between brain cells. Many alcoholics develop a condition called Wernicke-Korsakoff syndrome and experience mental confusion and lack of coordination,
17、 and they may also have memory and learning problems.The body responds to the continual introduction of alcohol by coming to rely on it. This dependence causes long-term, debilitating (衰弱) changes in brain chemistry. The brain accommodates for the regular presence of alcohol by altering neurotransmi
18、tter production. But when the person stops or dramatically reduces his or her drinking, within 24 to 72 hours the brain goes into what is known as withdrawal as it tries to readjust its chemistry. Symptoms of withdrawal include disorientation, hallucinations (幻觉), delirium tremens(DTs), nausea, swea
19、ting and seizures.Alcohol and the Rest of the BodyOver time, alcohol can inflict serious damage on other body parts as welt.Liver: The liver is particularly vulnerable to the effects of alcohol because it is the organ in which alcohol and other toxins are metabolized (broken down into less harmful s
20、ubstances to be removed from the body). Drinking over a long period can lead to alcoholic hepatitis, or inflammation of the liver. Symptoms of this condition include nausea, vomiting, fever, loss of appetite, abdominal pain and jaundice (a yellowing of the skin).Heart: Because alcohol lowers blood p
21、ressure, the heart overcompensates, and the heart muscle can eventually become damaged as a result. Prolonged drinking increases the risks for heart disease, high blood pressure and certain kinds of stroke.Stomach: Alcohol irritates the lining of the stomach and intestines, causing vomiting, nausea
22、and eventually ulcers.Cancer: Research indicates that long-term drinking increases the risk of cancers of the mouth, throat, larynx and esophagus.The effects of alcohol are even more marked in adults over 65, because their bodies dont metabolize alcohol as well as those of younger adults. Women also
23、 have more difficulty metabolizing alcohol than men, because they are typically smaller and lighter in weight.Treatment for AlcoholismIn the Unites States, approximately 2 million people get help each year for alcoholism. Alcoholism treatment may include:Detoxification: This involves abstaining from
24、 alcohol in order to get alcohol completely out of a persons system, and it takes anywhere from four to seven days.Pharmaceuticals: People can take drugs such as disulfiram or naltrexone to prevent a relapse once theyve stopped drinking. In 2004, the U. S. Food it had craters and mountains not【B19】t
25、o the human eye. He also discovered that the sun had spots. These discoveries all【B20】the Ptolemaic system.68 【B1 】（A）risen（B） shone（C） existed（D）descended69 【B2 】（A）universe（B） gods（C） spirit（D）nature70 【B3 】（A）track（B） change（C） spend（D）take71 【B4 】（A）explanation（B） exploration（C） expansion（D）expe
26、dition72 【B5 】（A）escort（B） protect（C） accompany（D）lead73 【B6 】（A）effectively（B） comparatively（C） actively（D）relatively74 【B7 】（A）discover（B） develop（C） operate（D）crash75 【B8 】（A）faint（B） brilliant（C） general（D）original76 【B9 】（A）by（B） from（C） as（D）for77 【B10 】（A）guard（B） aid（C） remedy（D）aim78 【B11 】
27、（A）reveal（B） conceal（C） steal（D）repeal79 【B12 】（A）up（B） with（C） out（D）on80 【B13 】（A）thought（B） feeling（C） attitude（D）view81 【B14 】（A）theory（B） invention（C） development（D）discovery82 【B15 】（A）as（B） against（C） in（D）for83 【B16 】（A）showed（B） realized（C） engaged（D）made84 【B17 】（A）reformed（B） affirmed（C） informed（D）confirmed85 【B18 】（A）single（B） perfect（C） different（D）separate86 【B19 】（A）feasible（B） negligible（C） visible（D）eligible87 【B20 】（A）confused（B） reconciled（C） contradicted（D）contrasted
