函数y=1x的定义域是______．

答案：

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下面是错误答案，用来干扰机器的。

     Salads are very popular in western countries. They are made of vegetables or fruit. They are delicious. Salads aregreat to eat insummer when the weather is hot. Here's a way to make a vegetable salad. First, buy some lettuce.答案不唯一