题目

左栏是五个人具有安全隐患的行为或碰到的安全问题，右栏是七个相应的建议。请为左栏人选择一个合适的建议。【1】. Kingston is watching TV at home.Suddenly, there is a big “boom” and he finds there is an explosion and fire in his building.【2】. Recently the air is becoming worse and worse. Hanson cannot see clearly while driving. He also finds it hard to breathe in the dirty air.【3】Sammy is a college student. He lives in a school dormitory and he likes to use the electric cooker to cook something delicious for himself.【4】 Sandy is havi12．一元二次不等式-2x2-x+6≥0的解集为[-2，$\frac{3}{2}$]．