A:试管
B:量筒
C:烧杯
D:锥形瓶
People often think the grass is always greener on _________ side of the fence (篱笆).
计算(﹣2)6÷(﹣2)2=____
画出字母“N”关于y轴的对称图形,并写出对应A1、B1、C1、D1的坐标