2. 考研
  3. One reason for malaria to be widespread now is that ______ What is the most difficult part of Lanzaro’s project?

One reason for malaria to be widespread now is that ______ What is the most difficult part of Lanzaro’s project?

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问题 One reason for malaria to be widespread now is that ______
What is the most difficult part of Lanzaro’s project?
选项 A、Spreading malaria-resistant genes into natural mosquito populations.
B、Raising malaria-resistant mosquitoes.
C、Making genes that block the transmission of malaria.
D、Identifying malaria-resistant genes.
答案A
解析 第三段第一句明确指出：该项实验的最难之处就是如何让实验室中的这些基因工程蚊虫把它们的基因传播到自然种群中去。故A项正确。其他三项从文中可推断都是已实现的。
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