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An international team of research scientists has created a new kind of rice that contains Vitamin A. The researchers used genetic engineering to create the new rice. Genetic engineering is the technology of changing the genes of living things. The researchers say the rice could help millions of people who do not get enough Vitamin A in the food they eat. The findings were published in Science magazine. Vitamin A is necessary for the body’s natural defense system against disease. Vitamin A is needed to help prevent skin and other tissues from drying out. It also produces a light-sensitive substance in the eyes. People who do not get enough Vitamin A cannot see well in the dark. They may develop a condition that dries the eyes. The condition can result in infections that lead to blindness. A lack of Vitamin A is a major cause of blindness among children. Health experts estimate that 124 million children around the world do not eat enough foods with Vitamin A. Vitamin A is found in fish liver oil and in the yellow part of eggs. Vegetables such as carrots and sweet potatoes contain beta carotene, a substance that the body changes into Vitamin A. Public health campaigns to provide Vitamin A to those who need it have proved costly. And they are not always effective. That has led researchers to try to create foods with the vitamin. Rice is one of the most common crops grown worldwide. However, normal rice lacks Vitamin A. Researchers at a laboratory in Switzerland found a way to change the genetic material of rice. They added three genes to the rice. The genes produce beta carotene, the chemical that our bodies change into Vitamin A. The new rice has a golden yellow color. The researchers say 200 grams of the rice have enough beta carotene to provide the necessary amount of Vitamin A. Biologist Mary Lou Guerinot of Dartmouth College wrote a commentary published with the report in science magazine. She said the rice is an excellent example of the good things that can be done with genetic engineering. However, critics of genetic engineering argue that changing plant genes could increase risks to human health or the environment. According to the passage, genetic engineering is a new way to help people keep healthy.

A. Right
B. Wrong
C. Not mentioned

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某城市进行城市道路改造,拟新建一条长10km的城市一级道路,承包商为了保证工程按期按质完成,在施工前首先编制了施工组织设计,在编制路基工程施工组织设计时,除了与总体施工组织设计内容基本相同外,还根据路基工程施工的自身特点,在确定施工方案和进度计划时,重点考虑了以下情况: (1)施工进度计划; (2)布置好堆料点、运料线、行车路; (3)钻爆作业没计; (4)弃碴场设计; (5)工地施工组织; (6)生产要素配置; (7)施工方法和土石方调配方案。 问题:1.在确定路基工程施工方案和进度计划时考虑的情况中,哪些项不是确定路基工程施工方案和进度计划时应重点考虑的2.项目总体施工组织设计的编制方法和步骤有哪些3.路面工程施工组织设计编制时,要根据路面工程施工的自身特点充分考虑哪些因素

The amazing success of humans as a (91) is the result of the evolutionary development of our brains which has led, among other things, to tool-using, tool-making, the (92) to solve problems by logical reasoning, thoughtful cooperation, and language. One of the most striking ways in which chimpanzees biologically (93) humans (94) in structure of their brains. The chimpanzee, with the capacity for (95) reasoning, (96) a type of intelligence more like that of humans than (97) any other mammal living today. The brain of the modern chimpanzee is probably not too dissimilar (98) the brain that so many millions of years ago (99) the behavior of the first ape man. For a long time, the fact that prehistoric people made (100) was considered to be one of the major (101) distinguishing them from other creatures. (102) pointed out earlier, I have watched chimpanzees (103) grass stems in order to use them to probe for termites. It is tree that the chimpanzee does not (104) tools to "a regular and set pattern"—but then, (105) people, before their development of stone tools, undoubtedly poked around (106) sticks, and straws, at which stage it seems (107) , that they made tools to a set pattern either. It is because of the close (108) in most people’s minds of tools with humans (109) special attention has always been focused upon any animal able to use an object as a tool: but it is important to realize that this ability, on its own, does not necessarily indicate any special intelligence in the creature (110) .

A. old
B. prehistoric
C. modem
D. ancient

Dear Ms. Pam Hill, A friend informed me that the Chicago office of your company, B.S. Accounting, is actively seeking to hire quality individuals for the Auditor (审计师) Development Program. I have more than two years of accounting experience. I will be receiving my BBA this May from Illinois State University. I am confident that my combination of practical work ex perience and solid educational experience has prepared me for making an immediate contribu tion to B. S. Accounting. I believe my professional background will provide your office with a highly productive Auditor upon completion of your Development Program. I will be in the Chicago area the week of May 22. Please call me at 589-303-777 to arrange a convenient time when we may meet to further discuss my background in relation to your needs. If I have not heard from you by May 29, I will contact your office to inquire as to a potential meeting date and time. I look forward to meeting you then. Sincerely, Robert Herman Why does the company want to hire people To complete their______.

A——taxi meter B——request stop C——cab driver D——whole book of tickets E——bus transportation F——passenger train G——freight train H——station master I——traffic circus J——double-decker K——long-distance bus L——inimum fare(of a taxi) M——road sweeper N——traffic policeman O——fire engine P——traffic jam ( ) 长途汽车 ( )火车

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