Which of the following statements is supported by the passage? A major point of this passage is that ______.

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问题 Which of the following statements is supported by the passage?
A major point of this passage is that ______.

选项 A、good locks are essential to home’s security
B、there are many types of security alarm systems for the home
C、an ounce of prevention is worth a pound of cure
D、there are burglar alarm systems that can be installed without professional help

答案D

解析 通读全文可以看出短文主要向我们介绍了一种无须专业支持用户可自行安装的防盗装置。
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