2015届高三英语（人教版必修5）一轮复习单元测试：Unit 1　Great Scientists Word版含答案_高考复习指南

2015届高三英语（人教版必修5）一轮复习单元测试：Unit 1　Great Scientists Word版含答案

　　Plants have an ability, for example, to signal pain or discomfort caused by anything from temperature extremes to an insect attack. Jack Schultz, a professor of chemical ecology at the University of Missouri, says when a plant senses that it's being eaten, it cannot walk away from trouble; on the contrary, it will release a chemical vapor that alerts other plants nearby. “Their language is a chemical language, and it involves chemicals that move through the air that are easy to be changeable, and most of all are smells that we are familiar with，” Schultz explained. “All plants responded to the attack by changing their chemistry to defend themselves，” Schultz recalled. “But we were quite surprised to find that nearby plants also changed their chemistry to defend themselves, even though they were not part of the experiment.” Studies have also shown that plants under attack release pleasant chemicals. Those chemicals attract friendly insects that attack the pests eating the plant. In the end, plants' ability to communicate their needs—and our ability to understand them—could help farmers reduce the use of poisonous chemicals, cut operating costs and limit damage to the environment. 文章大意：本文是一篇科普类文章，主要讲述了“植物的特殊语言”及功能，以及这种特殊语言对农业生产可能产生的指导意义。 1．The recent scientific studies have shown that plants can ______. A．communicate with other living things in a chemical way B．hardly react to any sudden change in temperature C．use a very special chemica1 language which is familiar to us D．respond to the attack by giving off poisonous chemicals 答案：A　细节理解题。根据文章第二段中的“Plants are able to communicate with all sorts of organisms (有机体)．.. They do this chemically.”可知，植物能够与其他生物通过化学方式进行交流。故答案选A。 2．When being eaten by an insect, the plant will ________. A．walk away from trouble B．change its chemistry to kill the insect C．release a chemical vapor to “ask” other plants for help D．give off nice chemicals to attract friendly insects killing the pest 答案：D　细节理解题。根据文章第三段中的“when a plant senses that it's being eaten... on the contrary, it will release a chemical vapor...”以及文章倒数第二段中的“Those chemicals attract friendly insects that attack the pests eating the plant.”可知，当植物被昆虫吞食的时候，植物会释放一种化学蒸汽，这种化学蒸汽能够吸引有益的昆虫来袭击害虫。故答案选D。 3．The underlined word “alert” most probably means “______”． A．warnB．protect