The phrase 'that's to say' may introduce the readers an example.
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The writer often uses synonyms and contrasts to make the passage more impressive.
A. 对
B. 错
Please match the words according to the word buiding
在接触设备之前，应佩戴（）
A. 防静电手环
B. 静电手环
C. 防静电手套
D. 静电衣
RUN是（）指示灯
A. 运行
B. 警告
C. 时钟锁
D. 主备状态
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