A. identify other means of the breakdown
B. find out the source of the enzyme
C. confirm the research findings
D. increase the breakdown speed
45. It can be inferred from the last paragraph that the chemical might
.
A. help to raise worms
B. help make plastic bags
C. be used to clean the oceans
D. be produced in factories in future
46. What is the main purpose of the passage?
A. To explain a study method on worms.
B. To introduce the diet of a special worm.
C. To present a way to break down plastics.
D. To propose new means to keep eco-balance.
【答案】43. C
44. B
45. D
46. C
【解析】本文为说明文。文章介绍了一种吃塑料的虫子大蜡螟,它胃中的酶能够降解塑料,这为解决塑料污染提供了新的途径。
43. 细节理解题。根据文章第三段Federica Bertocchini, co-author of the study, says the worms’ ability to break down their everyday food — beeswax — also allows them to break down plastic.可知,研究结果发现,蠕虫分解日常食物的能力让它们可以分解塑料,也就是说它们可以消费塑料。故选C。
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