扫描二维码，直接登录
题库 / OG2017V-SC-284
Schistosomiasis, a disease caused by a parasitic worm, is prevalent in hot, humid climates, and it has become more widespread as irrigation projects have enlarged the habitat of the freshwater snails that are the parasite's hosts for part of its life cycle.
the freshwater snails that are the parasite's hosts for part of its life cycle
the freshwater snails that are the parasite's hosts in part of their life cycle
freshwater snails which become the parasite's hosts for part of its life cycles
freshwater snails which become the hosts of the parasite during the parasite's life cycles
parasite's hosts, freshwater snails which become their hosts during their life cycles
还没有题目讲解（毕出老师会陆续发布对官方考题的解读，请保持关注）。
c The original sentence clearly stated that the habitat of specific freshwater snails has enlarged. These snails are the parasite’s hosts.
On the contrary, this choice implies that the habitat of freshwater snails (not any specific freshwater snails) has enlarged and by the way these snails become the parasite’s hosts. Thus, this choice no longer communicates the specificity of the freshwater snails as intended by the original sentence.
登录 或 注册 后可以参加讨论