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- 2013-2-22
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1. Unlike crested wheatgrass, an alien species from Siberia that forms only shallow roots and produces tall above-ground schools, native North American grasses develope an extensive root system, allow for greater enrichment of the soil, but do not grow to be very tal.
正确答案就是这个,但是为什么but 后面直接跟do not grow啊,也没有主语,我记得prep08语法总结上这种形式是不行的啊。
2. An international group of more than 2000 scientists projects an average global warming of between 1.8 and 6.3 degree year 2000.
这个题同样也是正确答案,但总感觉of between 连一块说不妥吧。把划线部分改为 projects global warming to average from 1.8 to. 不行么
3. pioneered by scientist at LA Laboratory, BEAM robots are not programmed to walk; instead they use brainlike circuits called neural network to learn to walk through trial and error.
这个题我疑惑的是我觉得和之前的pionnered 匹配的应该是这个新方法吧,所以我觉得的brainlike circuits应该做划线部分的主语。
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