题目内容
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提问人:网友fxzhou_hbsha
发布时间:2022-01-07
[主观题]
It has been ______ by dead-bolt locks, security chains, electronic alarm systems and trip
wires________ a police station or private guard firm. Many _______ families have sliding glass doors on their patios, with steel bars elegantly built in so no one can _____ the doors open.
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