The researchers stress the urgency of preserving old varieties as both disease-resistant strains and ones that will thrive witho

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问题 The researchers stress the urgency of preserving old varieties as both disease-resistant strains and ones that will thrive without high levels of pesticide or fertilizer application.

选项 A、assistance
B、proficiency
C、insistence
D、prophecy

答案C

解析 词义辨析。根据上下文,此处urgency指研究人员认为进行保护的必要性。答案运用形近词进行干扰,区分出词义即可选出答案。
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