A:Let me have a look.
B:I don’t feel well.
C:Where does it hurt?
D:What’s the matter?
计算:
(1)(48﹣418)﹣(313﹣20.5);
(2)(2﹣3)2+213×32;
(3)5ab•(﹣4a3b)(a≥0,b≥0).
现代家庭装修中有些浴室使用燃气热水器提供热水,小芳家安装了燃气热水器.已知水进入热水器前的温度是10℃,洗澡时热水器输出热水的温度设定为40℃;如果小芳洗一次澡用热水0.05m3,水的比热容是4.2×103J/kg.℃.求:
— Wow! Your school is so beautiful!
— Thank you! It last year.
读我国某地等高线地形图,回答下列问题。