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Schistosomiasis, a disease caused by a parasitic worm, is prevalent in hot, humid climates, and it has become more widespread as irrigation projects have enlaged the habitat of the freshwater snails that are the parasite's hosts for part of its life cycle.
(A) the freshwater snails that are the parasite's hosts for part of its life cycle
(B) the freshwater snails that are the parasite's hosts in part of their life cycle
(C) freshwater snails which become the parasite's hosts for part of its life cycles
(D) freshwater snails which become the hosts of the parasite during the parasite's life cycle
(E) parasite's hosts, freshwater snails which become their hostsduring their life cycles
此题答案选A,结合CD的讨论和OG的解释整体都很清晰,但OG上有一个解释我不是很明白,请NN们帮忙看一下:
关于答案B,OG解释说 对于duration的介词,不能用in,可以用for , 可是life cycle是可以与in搭配的啊,请NN们指点一下,谢谢~~~
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