单项选择题

A．They stay closed until summer comes.
B．They cater chiefly to tourists.
C．They are busy all the year round.
D．They provide quality service to their customers.
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Technologies are not value-neutral but are_____________ phenomena.
填空题
The library provides books and materials to the U.S. Congress and also lends books to other American libraries, government agencies, and foreign libraries.
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