原始问题：
1. 为以下各段落撰写恰当的主题句。
The first computer was invented in the 1940s and since then computers have become an integral part of our lives.
Answer: The invention of the computer revolutionized our lives.
1. 为以下各段落撰写恰当的主题句。
The first computer was invented in the 1940s and since then computers have become an integral part of our lives.
Answer: The invention of the computer revolutionized our lives.
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