此题我觉得很奇怪!主要是在CE两项,至于D项个人认为是无关项!
文中讲A certain cultivated herb is one of a group of closely related plants that thrive in soil with high concentrations of metals that are toxic to most other plants. 而在结尾处又有Possibly, therefore, the herb’s high histidine production is what allows it to grow in metal-rich soils, a hypothesis that would gain support if ______.
thrive和to grow看来是同义的了。所以我觉得不是在成熟前才需要histidine,为了thrive他应该一直都有用!
忘了说我选什么了,嗬嗬,我选C项
[此贴子已经被作者于2005-11-29 17:30:02编辑过] |