你為什么認為數學書有那樣的數學題呢？

　　Why do you think that math books have so math problems?

　　艾米把數學書落在家了。

　　Amy had left her math book at home.

　　我正找我的數學書，我找不到了。

　　I am reading a very interesting book, which is about mathematics.

　　英語書，語文書，數學書

　　English book, Chinese book, math book

　　昨天查了數學書：截距一定是正的，它是某一軸上坐標的絕對值。

　　Distance: The length or numerical value of a straight line or curve.