New characteristics can be introduced into crops, using either ____1____ crossbreeding or genetic modification, GM, ____2____. The characteristics of all living organisms, such as size, color, and shape are ____3____ by their genes and their ____4____ with the environment. With improvements in our knowledge about which plant genes do what, we now know many genes that could contribute to improving ____5____ food production.In some ____6____, conventional breeding will be the best way to deploy these genes, that is, by crossbreeding the crop variety with the ____7____ that contains the genes providing these ____8____. In other cases, GM, where scientists take a gene and insert it ____9____ into a crop, might be easier, or indeed the only ____10____ they can be deployed.
New characteristics can be introduced into crops, using either ____1____ crossbreeding or genetic modification, GM, ____2____. The characteristics of all living organisms, such as size, color, and shape are ____3____ by their genes and their ____4____ with the environment. With improvements in our knowledge about which plant genes do what, we now know many genes that could contribute to improving ____5____ food production. In some ____6____, conventional breeding will be the best way to deploy these genes, that is, by crossbreeding the crop variety with the ____7____ that contains the genes providing these ____8____. In other cases, GM, where scientists take a gene and insert it ____9____ into a crop, might be easier, or indeed the only ____10____ they can be deployed.
题目解答
答案
解析
本题主要考查农业科技相关词汇的运用，涉及传统育种与转基因技术的区别、基因与环境的关系等概念。解题关键在于：
- 理解上下文逻辑关系，根据前后文确定空格处需要表达的核心含义；
- 掌握学科术语，如基因、性状、相互作用等专业词汇；
- 区分近义词用法，如
conventional与traditional的细微差别。
第1空
逻辑关系：与后文genetic modification形成对比，表示传统方法。
关键点：conventional强调“常规的、传统的”，符合“crossbreeding（杂交）”这一传统育种方式。
第2空
逻辑关系：需与GM对应，说明技术本身。
关键点：technology表示“技术”，与genetic modification构成完整表达。
第3空
逻辑关系：基因决定生物特征。
关键点：determined表示“决定”，与by their genes构成固定搭配。
第4空
逻辑关系：基因与环境的动态关系。
关键点：interaction表示“相互作用”，强调基因与环境共同影响性状。
第5空
逻辑关系：修饰全球粮食生产。
关键点：global表示“全球的”，突出技术应用范围。
第6空
逻辑关系：列举不同情况。
关键点：cases表示“情况”，与后文in other cases呼应。
第7空
逻辑关系：传统育种需选择亲本。
关键点：parent表示“亲本”，指含目标基因的原始品种。
第8空
逻辑关系：基因提供的特性。
关键点：traits表示“性状”，是生物学中描述基因功能的常用词。
第9空
逻辑关系：转基因技术的直接性。
关键点：directly强调“直接插入基因”，体现技术特点。
第10空
逻辑关系：唯一可行的方法。
关键点：way表示“方法”，与only搭配说明技术的唯一性。