The standby time for operation of an alarm system on secondary power in a household system must be no less than _____.

a. 10 hours
b. 12 hours
c. 24 hours
d. 60 hours


c. 24 hours

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____________________ Language (Perl) is a free script language that runs on many operating systems, including UNIX, Linux,Windows, and Mac OS X.

Fill in the blank(s) with the appropriate word(s).

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