a cat's ability to survive falls is based on fact

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/14 14:27:25

a cat's ability to survive falls is based on fact
为什么fact不用复数facts形式?

应该是facts,泛指.fact 作为可数名词,不可以在前面无限定词的情况下以单数形式出现
再问：呵呵.真的非常感谢.不过还不是特别懂,你能说得稍微再详细点吗?
再答：举个例子：这是书。（汉语没问题） This is book. (典型错句）原因： book 是单数可数名词，这时它前面必须得有冠词，物主代词等才行。如： This is a book. This is my book 等。要么用复数. These are my books. 明白？相信你能明白我的意思

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