2. 考研
  3. In recent years a new farming revolution has begun, one that involves the【B1】______of life at a fundamental level—the gene. The

In recent years a new farming revolution has begun, one that involves the【B1】______of life at a fundamental level—the gene. The

admin2018-04-27  29
问题     In recent years a new farming revolution has begun, one that involves the【B1】______of life at a fundamental level—the gene. The study of genetics has 【B2】______ a new industry called biotechnology. As the name suggest, it【B3】______biology and modem technology through such techniques as genetic engineering. Some of the new biotech companies specialize in agriculture and are working feverishly to 【B4】______ seeds that give a high yield, that 【B5】______ diseases, drought and frost, and that reduce the need for 【B6】______ chemicals. If such goals could be achieved, it would be most【B7】______. But some have raised concerns about genetically engineered crops.
    In nature, genetic diversity is created within certain 【B8】______. A rose can be crossed with a different kind of rose, but a rose will never cross with a potato. Genetic engineering, 【B9】______ usually involves taking genes from one species and inserting them into another【B10】______to transfer a desired characteristic. This could mean, for example, selecting a gene which leads to the production of a chemical with anti-freeze 【B11】______ from an artic fish, and inserting it into a potato or strawberry to make it frost-resistant.【B12】______, then, biotechnology allows humans to【B13】______the genetic walls that separate species.
    Like the green revolution,【B14】______some call the gene revolution contributes to the problem of genetic uniformity—some say even more so【B15】______geneticists can employ techniques such as cloning and 【B16】______ culture, processes that produce perfectly【B17】______copies. Concerns about the erosion of biodiversity, therefore, remain. Genetically altered plants, however, raise new【B18】______,such as the effects that they may have on us and the environment. "We are flying blindly into a new【B19】______of agricultural biotechnology with high hopes, few constraints, and little idea of the potential【B20】______," said science writer Jeremy Rifkin.
【B10】
选项 A、to the point
B、in no case
C、in an attempt
D、with regard
答案C
解析 考查介词短语辨析。注意空格后的to为不定式，能用于此结构的只有C．in an attempt，in an attempt to do sth表示“试图做…”。to the point“切中要害，对准”，语义与搭配均不符；in no case“决不”，不与to搭配；with regard虽可与to连用，但with regard to表示“关于”，此处的to是介词符号，后面跟名词性短语。故选C。
转载请注明原文地址:https://kaotiyun.com/show/QI6Z777K
0

考研英语一

相关试题推荐
随机试题
最新回复(0)