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Part B Directions: In the following article some paragraphs have been removed. For Questions 66-70, choose the most suitable paragraph from the list A-F to fit into each of the numbered gaps. There is one paragraph which does not fit in any of the gaps. Mark your answers on ANSWER SHEET 1. Supermarket shoppers have never been more spoilt for choice. But just when we thought traditional systems of selective farming had created the most tempting array of foods money can buy, we are now being presented with the prospect of genetically created strains of cabbages, onion, tomato, potato and apple. It may not tickle the fancy of food purists but it fires the imagination of scientists. Last week they discovered that the classic Parisian mushroom contains just the properties that, when genetically mixed with a wild strain of mushroom from the Sonora desert in California, could help it grow en masse while at the same time providing it with the resilience of the wild strain. 66.______ ' We have found a way of increasing the success rate from one to 90 per cent. ' This is just one of the many products that, according to skeptics, are creating a generation of 'Frankenfoods'. The first such food that may be consumed on a wide scale is a tomato which has been genetically manipulated so that it does not soften as it ripens. 67.______ Critics say that the new tomato—which cost $25 million to research—is designed to stay on supermarket shelves for longer. It has a ten-day life span. Not surprisingly, every-hungry US is leading the search for these forbidden fruit. By changing the genes of a grapefruit, a grower from Texas has created a sweet, red, thin-skinned grapefruit expected to sell at a premium over its California and Florida competitors. For chip fanatics who want to watch their waist-lines, new high-starch, low-moisture potatoes that absorb less fat when fried have been created, thanks to a gene from intestinal bacteria. The scientists behind such new food argue that genetic engineering is simply an extension of animal and plant breeding methods and that by broadening the scope of the genetic changes that can be made, sources of food are increased. Accordingly, they argue, this does not inherently lead to foods that are less safe than those developed by conventional techniques. But if desirable genes are swapped irrespective of species barriers, could things spiral out of control? 'Knowledge is not toxic, 'said Mark Cantley , head of the biotechnology unit at the Organisation for Economic Cooperation and Development, 'It has given us a far greater understanding of how living systems work at a molecular level and there is no reason for people to think that scientists and farmers should use that knowledge to do risky things. ' Clearly, financial incentive lies behind the development of these bigger, more productive foods. But we may have only ourselves to blame. In the early period of mass food commerce, food varieties were developed by traditional methods of selective breeding to suit the local palate. But as suppliers started to select and preserve plant variants that had larger fruit, consumer expectations rose, leading to the development of the desirable clones. Still, traditionalists and gourmets in Europe are fighting their development. 68.______ Even in the pre-packaged US, where the slow-softening tomato will soon be reaching supermarkets, 1, 500 American chefs have lent their support to the Pure Food Campaign which calls for the international boycott of genetically engineered foods until more is known about the consequences of the technology and reliable controls have been introduced. In the short term, much of the technology remains untested and in the long term the consequences for human biology are unknown. Questions have arisen over whether new proteins in gen
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【单选题】为了保障人身安全,将电气设备正常情况下不带电的金属外壳接地称为
A.
A工作接地
B.
B保护接地
C.
C工作接零
D.
D保护接零
【判断题】城镇土地等反映城镇之间土地的地域差异。
A.
正确
B.
错误
【多选题】颜色模型是指彩色图像所使用的颜色描述方式,常用的颜色模型有
A.
CMYK
B.
HSB
C.
RGB
D.
YUV
【多选题】图像颜色模型有
A.
RGB
B.
MIDI
C.
HSL
D.
COLOR
E.
CMYK
【单选题】城镇土地分等反映了城镇之间( )的地域差异
A.
生态环境
B.
经济发展
C.
土地质量
D.
土地资源
【简答题】蔗糖和氯化钠的阈值分别是0.03mol/L,0.01mol/L,说明氯化钠比蔗糖的感受性()。
【单选题】城镇土地分等定级采用“等”和“级”两个层次的划分体系。土地“等”反映城镇之间土地质量的( )差异。
A.
地域
B.
区位条件
C.
利用效益
D.
价值
【单选题】土地分等定级反映城镇之间______的地域差异。
A.
土地规划
B.
土地大小
C.
土地质量
D.
土地数量
【判断题】颜色模型指彩色图像所使用的颜色描述方法,常用颜色模型有RGB(红、绿、蓝)模型、CMYK(青、品红、黄、黑)模型等,这些颜色模型不能相互转换。
A.
正确
B.
错误
【判断题】颜色模型指彩色图像所使用的颜色描述方法,常用的颜色模型有RGB(红、绿、蓝)模型、CMYK(青、品红、黄、黑)模型等,这些颜色模型不能相互转换。
A.
正确
B.
错误
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