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标题: 大全test-4-12 [打印本页]

作者: greenbow43 时间: 2006-2-12 05:15
标题: 大全test-4-12

Most nations regard their airspace as extending upward as high as an aircraft can fly; no specific altitude, however, has been officially recognized as a boundary.

(A) as extending

(B) as the extent

(D) to be an extension（A）

(E) to extend

为什么不是B？extent名词，后面的upward as high as an aircraft can fly 修饰extent

作者: v521 时间: 2006-2-12 09:45
强调的是extend这个动作，upward修饰extend
而后面的an aircraft can fly是通过as high as与airspace extend做的比较

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