请教：extent 与 extending

maotian · 发表于 2004-3-31 18:16:00

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
(C) to be an extent
(D) to be an extension
(E) to extend

答案：A                     我选的是B

LONGMAN 里，B中extent有 the length or size of something 的意思，是不是因为extent 指的长度是指某个具体事物的具体长度，而不应是an aircraft can fly的不确定的高度？

                                                                                A中     extend        有            to    continue for a particular distance or over a particular area的意思——从这个来看，A是似乎是可以理解的。但在这用进行时，强调一种动作，似乎不好。

         总之这个题，我不大清楚，请大家指点。

tianwan · 发表于 2004-3-31 21:38:00

http://forum.chasedream.com/dispbbs.asp?boardID=23&ID=22920&page=1

maotian · 发表于 2004-4-1 10:09:00

不好意思。以后一定先搜索。这就去看。

请教：extent 与 extending

请教：extent 与 extending

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