It is futile to try to destroy pests completely with chemical poisons, for as each new chemical pesticide is introduced, the ins

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问题 It is futile to try to destroy pests completely with chemical poisons, for as each new chemical pesticide is introduced, the insects gradually become______to it.

选项 A、drawn
B、vulnerable
C、resistant
D、indifferent

答案C

解析 本题考查形容词辨析。逗号前的句子提到“试图用化学毒药完全清除害虫是徒劳的”,由此推断,每次使用新的化学杀虫剂,昆虫都会逐渐产生抗体,这也是无法根除的原因,故答案为resistant(抵抗的,抗……的,耐……的)。drawn意为“(人或人脸)清瘦的,憔悴的”。vulnerable意为“易感染(某种疾病)的,易患病的;脆弱的;易受影响的”。indifferent意为“冷漠的,不关心的,不积极的;(水平或质量)一般的,平庸的”。
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