2. 考研
  3. In recent years a new farming revolution has begun, one that involves the【C1】______of life at a fundamental level—the gene. The

In recent years a new farming revolution has begun, one that involves the【C1】______of life at a fundamental level—the gene. The

admin2019-06-10  27
问题     In recent years a new farming revolution has begun, one that involves the【C1】______of life at a fundamental level—the gene. The study of genetics has 【C2】______ a new industry called biotechnology. As the name suggest, it【C3】______biology and modem technology through such techniques as genetic engineering. Some of the new biotech companies specialize in agriculture and are working feverishly to 【C4】______ seeds that give a high yield, that 【C5】______ diseases, drought and frost, and that reduce the need for 【C6】______ chemicals. If such goals could be achieved, it would be most【C7】______. But some have raised concerns about genetically engineered crops.
    In nature, genetic diversity is created within certain 【C8】______. A rose can be crossed with a different kind of rose, but a rose will never cross with a potato. Genetic engineering, 【C9】______ usually involves taking genes from one species and inserting them into another【C10】______to transfer a desired characteristic. This could mean, for example, selecting a gene which leads to the production of a chemical with anti-freeze 【C11】______ from an artic fish, and inserting it into a potato or strawberry to make it frost-resistant.【C12】______, then, biotechnology allows humans to【C13】______the genetic walls that separate species.
    Like the green revolution,【C14】______some call the gene revolution contributes to the problem of genetic uniformity—some say even more so【C15】______geneticists can employ techniques such as cloning and 【C16】______ culture, processes that produce perfectly【C17】______copies. Concerns about the erosion of biodiversity, therefore, remain. Genetically altered plants, however, raise new【C18】______,such as the effects that they may have on us and the environment. "We are flying blindly into a new【C19】______of agricultural biotechnology with high hopes, few constraints, and little idea of the potential【C20】______," said science writer Jeremy Rifkin.
【C3】
选项 A、broods
B、breeds
C、blends
D、blasts
答案C
解析 考查动词辨析。blend意为“混合”，常和and连用，根据后面的biology and modern technology可知，C．blends符合语意。brood意为“沉思”；breed意为“培育”；blast意为“爆炸”，均不符合题意。
转载请注明原文地址:https://kaotiyun.com/show/tgnZ777K
0

考研英语一

相关试题推荐
随机试题
最新回复(0)