2. 外语
  3. In recent years a new farming revolution has begun, one that involves the 【21】______ of life at a fundamental level — the gene.

In recent years a new farming revolution has begun, one that involves the 【21】______ of life at a fundamental level — the gene.

admin2009-03-16  68
问题     In recent years a new farming revolution has begun, one that involves the  【21】______ of life at a fundamental level — the gene. The study of genetics has  【22】______ a new industry called biotechnology. As the name suggests, it  【23】______ biology and modem technology through such techniques as genetic engineering. Some of the new biotech companies specialize  【24】______ agriculture and are working feverishly to duplicate seeds that give a high yield, that  【25】______ diseases, drought and frost, and that reduce the need for  【26】______ chemicals.  【27】______   such goals could be achieved, it would be most beneficial. But some have raised concerns about genetically engineered crops.
    In nature, genetic diversity is created within certain space. A rose  【28】______ be crossed with a different kind of rose, but a rose will never cross with a potato. Genetic engineering,  【29】______ , usually involves taking genes from one species and inserting them into  【30】______ in an attempt to transfer a desired characteristic. This could mean,  【31】______ , selecting a gene which leads to the production of a chemical with anti-freeze quality from an arctic fish, and inserting  【32】______ into a potato or strawberry to make it frost-resistant. In essence, then, biotechnology allows humans to  【33】______ the genetic walls that separate species.
    Like the green revolution,  【34】______ some call the gene revolution contributes to the problem of genetic uniformity — some say even more so that geneticists can employ techniques  【35】______ as cloning and  【36】______ culture, processes that produce perfectly  【37】______ copies. Concerns about the erosion of biodiversity, therefore,  【38】______ . Genetically altered plants, however, raise new issues, such as the effects that they may have  【39】______ us and the environment. "We are flying blindly into a new era of agricultural biotechnology with high hopes, few constraints, and  【40】______ idea of the potential outcomes," said science writer Jeremy Rifkin.
选项 A、manipulation
B、management
C、manufacture
D、maturity
答案A
解析 考查名词辨义与上下文理解。manipulation控制，影响，改变；management管理，控制；manufacture生产，制造；maturity成熟。由于全文论述的都是改变作物基因的问题，因此选[A]。
转载请注明原文地址:https://kaotiyun.com/show/RFPd777K
本试题收录于： 公共英语四级笔试题库公共英语（PETS）分类
0

公共英语四级笔试

公共英语（PETS）

相关试题推荐
随机试题
最新回复(0)