雅思阅读真题(Part 2)
Part 2 · 考频:高频 · 最近考试:2026.4.18
Professor John Lovett from New England University, Australia, describes some of the ways in which plants ensure their own survival.
A
完整文章请进入机考练习查看。
答案:D
原文定位:recent research on the common thorn apple, Datura stramonium;has found that two powerful chemicals are released from the seed during the early stages of germination;In fact, it is necessary for the chemicals to be released from the seed coat so that the seed can germinate
同义替换:「reproductive process」↔「released from the seed during germination」,「example of a plant」↔「thorn apple」
答案:B
原文定位:In other plants of the same family the sacs contain a natural adhesive and the unsuspecting insect landing on such a leaf and rupturing a trichome sac is held onto the plant, unable to depart
同义替换:「a kind of glue」↔「natural adhesive」,「discourage attack」↔「unable to depart」,「plants use」↔「trichome sacs release adhesive」
答案:A
原文定位:spinifex has developed tightly rolled leaves which reduce the effects of drought stress;Many plants, such as the sunflower, have hairy leaves which are rough to the touch;unpleasant on the tongue
答案:C
原文定位:Chemical interactions that occur between plants are known as allelopathy
同义替换:「definition of the term allelopathy」↔「are known as allelopathy」
答案:B
原文定位:In these structures a tiny sac is carried on the hair;The sac contains chemicals which may perform a range of functions. For example, an insect landing on a tomato leaf and rupturing the sac is exposed to a toxic chemical which will deter it from feeding on that plant in future;In the leaves of the nettle plant these trichomes resemble miniature hypodermic syringes;a shot of the chemical is discharged though the "needle" and into the skin of the animal. The irritation the chemical causes is a deterrent against future threat
同义替换:「use chemicals」↔「toxic chemical」,「discourage predator」↔「deterrent against future threat」
答案:F
原文定位:Harnessing allelopathy is highly attractive to the farming industry;Enhancing allelopathic activity in crop and pasture plants could reduce this enormous bill. Developing and harvesting natural herbicides might also offer advantages in addressing environmental concerns about the over-use of synthetic chemicals
同义替换:「benefits」↔「offer advantages」,「plant-based chemicals」↔「natural herbicides」,「control weeds in agricultural areas」↔「crop and pasture plants」
答案:E
原文定位:Allelopathic chemicals function in quite subtle ways. Generally they are active in small quantities, they are effective only with certain other plants, they act by disrupting the plant's natural process and they have no known residual effects. It has also been found that the activity these chemicals may be synergistic
同义替换:「characteristics of allelopathic chemicals」↔「function in quite subtle ways」
答案:A
原文定位:Spinifex grass, a plant native to Australia, provides a notable example. Adapted to life in the hot, desert inland, spinifex has developed tightly rolled leaves which reduce the effects of drought stress
同义替换:「physical characteristic」↔「tightly rolled leaves」,「conserve water」↔「reduce the effects of drought stress」,「example」↔「spinifex grass」
答案:TRUE
原文定位:Some families of plants such as the Solanaceae;feature glandular trichomes;In the leaves of the nettle plant these trichomes resemble miniature hypodermic syringes
同义替换:「hypodermic syringes」↔「trichomes of the nettle plant」
答案:NOT GIVEN
答案:FALSE
原文定位:It has also been found that the activity these chemicals may be synergistic;that is;two or more such substances may combine to produce an effect that is greater than the effects of the substances acting in isolation;These are the very attributes which are being sought in the current development of synthetic hertpicides
同义替换:「individual」↔「two or more」
答案:FALSE
原文定位:as at least half of the more than a $200-million annual cost of crop protection in Australia is spent on herbicides
同义替换:「over」↔「more than」
答案:chemicals found in weeds can have practical benefits for agriculture.
原文定位:Harnessing allelopathy is highly attractive to the farming industry;Developing and harvesting natural herbicides might also offer advantages in addressing environmental concerns;Weeds produce powerful allelopathic chemicals that inhibit competitors; these characteristics are being sought in the development of synthetic herbicides
同义替换:「chemicals found in weeds」↔「allelopathic chemicals from weeds」,「practical benefits for agriculture」↔「natural herbicides, reduce cost, better for environment」