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名词解释题
细菌（bacterium）
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第一篇Genetic EngineeringGenetic engineering began when the DNA molecule（分子）,the most basic unit of life , was first described in 1953 by James Watson and Francis Crick.An understanding of DNA led to the altering of normal cell reproduction.Experiments with altering human cells began in 1970.In one of the first experiments,patients were injected with a virus that would produce a life-saving enzyme,but their bodies would not accept it.In 1980 patients with a rare but fatal blood disease were injected with a purified gene that was cloned through DNA technology.Another failure.Genetic engineering got a legal boost（激励）in 1980. The U. S. Supreme Court said that a patent couldbe granted on a genetically engineered "oil-eating" bacterium（细菌）.This bacterium would help clean up oil spills.The ruling encouraged companies to invent new life forms,and three important medical products were quickly developed.1.Human interferon（干扰素）—a possible solution to some cancers and viral diseases.A newly engineered bacterium produced human interferon as a by-product. This new product reduced the cost of interferon.2. Human growth hormone（荷尔蒙）一for children whose bodies do not grow to normal height. An expensive growth hormone was previously produced from human cadavers,but by changing the genetic make- up of the single-cell bacterium E.coli,and affordable growth hormone could be produced.3. Human insulin（胰岛素）一for the treatment of diabetes. People with diabetes used to rely on a beef- or-pork-based product until 1982.Now insulin can be manufactured by genetically altered bacteria.Advances in genetic engineering have continued,though they constantly must be weighed against the safety of procedures.There is clearly much more to discover.In this passage,the three genetically engineered medical products are presented_________.A:as a processB:in a simple listC:from earliest to latestD:as a story
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汉泽英：“数量；合同”，正确的翻译为：（）。
A. bacterium ； content
B.quantity ； commodity
C. protein ； content
D.quantity ； contract
考题
革兰氏阳性细菌与革兰氏阴性细菌相比，最大的区别是（）。A、革兰氏阳性细菌有线粒体，而革兰氏阴性细菌没有B、革兰氏阳性细菌有核糖体，而革兰氏阴性细菌没有C、革兰氏阳性细菌有荚膜，而革兰氏阴性细菌没有D、革兰氏阳性细菌有坚韧而厚度较高的细胞壁，革兰氏阴性细菌没有
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单选题The author of Passage 2 believes that the intermediate forms (line 66)connecting simple organisms to more complex ones ______.A
have not yet been found, casting doubt on macroevolutionary processesB
do not exist, proving that macroevolution is impossibleC
are no longer debated in the scientific communityD
prove that all living things are descended from a common ancestorE
show that horses are more closely related to humans than are bacterium
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单选题In sewage treatment, the term maceration refers to the process of （）A
breaking up solid matter into fine particlesB
precipitating non-decomposed waste in a collection tankC
chemically adjusting the sewage ph to 7-0D
eliminating bacterium coli from the sewage
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名词解释题溶原性细菌（lysogenic bacterium）
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