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球形铰链有个约束反力。

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Fill in the blanks with the correct words from the text.In class,she 1 notes with it,instant-messaging or 2 friends .With many schools ___ 3_wireless Internet access anywhere on campus,colleges as a group have become the most _4_ spots in the world.For most undergraduates, -5- Internet connectivity is the -6- of college life.But in doing so, students must remember to --7- and -8-your time.With the widespread -9- of computer technology,we are going to-10- a generation of problem-solvers and intelligent thinkers.