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[作文] 【每天更新】Official 15 Task 1求改求指点 [复制链接]

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发表于 2018-4-16 16:29:03 |显示全部楼层
The reading proposed three measures to prevent the small native animals in Australia from the threat of the cane toad. However, the lecture argues that they are not good measures.
Firstly, the reading states that a national fence could stop the spread of the cane toad by isolating cane toad from the places where they do not appear. However, the lecture says that since the young cane toad and eggs are in the water, they could be carried by the stream, go through the national fence to the new places. Therefore, the national fence can not prevent places from the intrusion of the cane toad.
Secondly, the reading states that volunteers could capture and annihilate the toads, since the cane toads are easily captured by traps and hands. Nevertheless, the lecture argues that the untrained volunteers could also unavoidably destroy the native frogs. Especially, for the untrained volunteers, the young frogs are hard to be distinguished from the young toads. Therefore, the idea that organizing volunteers is not a good choice.
Thirdly, the reading proposes that the designed virus could be used to control the cane toad population, without harming other contagious toads. However, the lecture disagrees and presents that the toad is an important species in other regions, like America. Since the toad could transport to new continents by the carry of the biological experts, it would cause a cataclysm to the ecology system in America. therefore, virus should not be developed for the cane toad.
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