◎ 题干
We must always be careful with ______. It's our good servant as well as a dangerous enemy.
[     ]
A. electricity
B. electrical
C. electric
D. electronic
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“We must always be careful with ______. It's our good servant as well as a dangerous enemy. [ ]A. electricity B. electrical C. electric D. electronic …”主要考查了你对  【不可数名词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。