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标题: 大全551 [打印本页]

作者: oldersea 时间: 2006-2-1 15:45 标题: 大全551

551 Once positioned in space, the Hubble Space Telescope will capture light from sources twenty times fainter compared to those that can be detected by ground-based instruments.

(A) compared to those that can be detected

(B) compared to those they can detect

(D) than those that can be detected（D）

(E) than those detecting

选项D those 指代的是other sources吗？但 fainter 比较的是light啊？是什么能被detected，sources 还是light?

作者: saibei008 时间: 2006-2-4 16:36

Once positioned in space, the Hubble Space Telescope will capture light from sources twenty times fainter than those(light) that can be detected by ground-based instruments(which can capture light from sources at regular distance).

有时添一下就明白了

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