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GRE阅读模拟在线练习附答案一百二十七

2018-08-21 17:32:00来源：网络

　　In the passage, the author is primarily concerned with

　　A.presenting a hypothesis and describing compelling evidence in support of it

　　B.raising a question and describing an important discovery that led to an answer

　　C.showing that a certain genetically caused disease can be treated effectively with drugs

　　D.explaining what causes the genetic mutation that leads to heart disease

　　E.discussing the importance of research on animals for the study of human disease

　　Which of the following drugs, if developed, would most likely be an example of the kind of drug mentioned in line 53?

　　A.A drug that stimulates the production of VLDL remnants

　　B.A drug that stimulates the production of LDL receptors on the liver

　　C.A drug that stimulates the production of an enzyme needed for cholesterol production

　　D.A drug that suppresses the production of body cells that use cholesterol

　　E.A drug that prevents triglycerides from attaching to VLDL's

　　The passage supplies information to answer which of the following questions?

　　A.Which body cells are the primary users of cholesterol?

　　B.How did scientists discover that LDL's are secreted from the liver in the form of a precursor?

　　C.Where in the body are VLDL remnants degraded?

　　D.Which body tissues produce triglycerides?

　　E.What techniques are used to determine the presence or absence of cell-surface receptors?

　　According to the passage, by studying the Watanabe rabbits scientists learned that

　　A.VLDL remnants are removed from the blood by LDL receptors in the liver

　　B.LDL's are secreted from the liver in the form of precursors called VLDL's

　　C.VLDL remnant particles contain small amounts of cholesterol

　　D.triglycerides are removed from VLDL's by fatty tissues

　　E.LDL receptors remove LDL's from the blood

　　The development of drug treatments for some forms of familial hypercholesterolemia is regarded by the author as

　　A.possible, but not very important

　　B.interesting, but too costly to be practical

　　C.promising, but many years off

　　D.extremely unlikely

　　E.highly probable

　　The passage implies that if the Watanabe rabbits had had as many LDL receptors on their livers as do normal rabbits, the Watanabe rabbits would have been

　　A.less likely than normal rabbits to develop heart disease

　　B.less likely than normal rabbits to develop high concentrations of cholesterol in their blood

　　C.less useful than they actually were to scientists in the study of familial hypercholesterolemia in humans

　　D.unable to secrete VLDL's from their livers

　　E.immune to drugs that lower cholesterol levels in people with certain forms of familial hypercholesterolemia

　　The passage implies that Watanabe rabbits differ from normal rabbits in which of the following ways?

　　A.Watanabe rabbits have more LDL receptors than do normal rabbits.

　　B.The blood of Watanabe rabbits contains more VLDL remnants than does the blood of normal rabbits.

　　C.Watanabe rabbits have fewer fatty tissues than do normal rabbits.

　　D.Watanabe rabbits secrete lower levels of VLDL's than do normal rabbits.

　　E.The blood of Watanabe rabbits contains fewer LDL's than does the blood of normal rabbits.

　　正确答案:B B C A E C B

　　以上就是关于“GRE阅读模拟在线练习附答案一百二十七”的内容，更多精彩内容，请关注GRE频道!


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