下列数据,最接近实际情况的是( )
A:教室课桌的高度约80cm
B:人步行的平均速度约为10m/s
C:现在教室的温度60℃
D:一个苹果的质量约为5kg
计算: |−2|+9×(12)−1−4×12−(π−1)0 .
—Have you read the book Harry Potter?
—Sure. Eric is also it and we become friends because of that.