54. What does the passage say is conservationists’ biggest worry?
A) A variety of spiders are threatened due to pollution of marshes and wasteland.
B) Certain species of spiders are endangered due to loss of their natural homes.
C) An increasing number of spiders are being killed by deadly pesticides.
D) More and more spider species are found losing their ability to migrate.
(本题出自2023年12月六级真题卷三)
答案&解析:
54.B)
第四段最后一句提到,但自然环境保护主义者最关心的是那些因栖息地丧失和碎片化而受到威胁的品种,这些因素使它们无法迁徙。由此可知,自然环境保护主义者最担心的是,某些品种的蜘蛛因为丧失栖息地而没有地方迁徙,故选项B正确,同时也可排除选项D,没有地方迁徙不代表失去了迁徙的能力。原文没有提到沼泽和荒地受到污染,故排除选项A。原文提到杀虫剂使昆虫数量下降,导致蜘蛛食物供应减少,但这不是自然环境保护主义者最担心的问题,故选项C也排除。
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