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求助语法

求助语法

[Rarely  has ]a technological development[ had ]as an [impact]on society as the rapid [grow ]of electronics0 Q" }2 g% {: r& Y$ b5 L1 S

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# v! [. u( j3 L2 g$ [这道题有两个has 怎样理解呢  % e! Q1 M7 L' [! n

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9 b& D$ T4 s& ^6 }, Rswim as much as 2000kilometers 为什摸不是    as many as呢

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前一个has是助动词,表明现在完成时,后一个had是实意动词,有。" _9 c$ c" w. Y9 Q

! j- @" j5 I* m# q, t/ l' z3 W+ h把原文打出来 。

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