What does federal government require public libraries to do?

In a nutshell, the Children's Internet Protection Act requires public libraries to install Internet filtering software on all of its computers (public access and staff) if the library uses federal money to purchase computers that will access the Internet or to purchase Internet access.

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the allies overtook outlying islands to make access to japan easier.

hygrometers and hair thermometers (often found as part of hygrometers/psychrometers) can be used to measure humidity. barometers are used to measure atmospheric pressure, while anemometers are used to measure wind speed. so the 2nd and 4th choices should be the correct answers.