5×7____7×8 5+5+5+5____4×5
32-12____6×3 6×6____12
读美国示意图,图中②地区人口密集,城市集中,适宜发展( )
若式子x-12在实数范围内有意义,则x的取值范围是( )
— are you late for school?
— Because I got up late.