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              live, invent, electronically, main, search
              (1) Customers to this shop are ________ tourists.
              (2) There are many useful ________ in our daily life.
              (3) The photos can be seen by many people, even those ________ in other countries.
              (4) Helen became an ________ engineer.
              (5) The computer can be used ________ for information.
              难度：中等
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