请教0208语法25和30题

crystalweica

25. Rarely has a technological development had as great an impact on society as the rapid grow of electronics.

请问这句话的正常语序是什么？has和had哪个才是谓语呢？谢谢！A tectnologocal development has rarely had as great an impact on society as...

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30. Of all the art-related reference and research library in North America, that of the LACENAME w:st="on">MetropolitanLACENAME> LACETYPE w:st="on">MuseumLACETYPE> of a Art in LACE w:st="on">New York CityLACE> is among the largest and most complete.

请问that of 这里是什么用法？可能是library的代词

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