题目

—Would you mind if my friend came along?        — ____________.        A．Sorry, I don't                         B．Yes, go ahead        C．No, please don't                       D．It's fine with me 答案：D4．下列说法中正确的有（　　）个．①-$\frac{3}{5}$是负分数； ②2、4不是整数； ③0是非负数：④-1.3不是有理数．A．1B．2C．3D．4