题目

目前，家庭装饰已成为一种时尚。随着装饰材料进入百姓家庭，新装修居室中常会缓慢释放出来污染物，进而影响人体健康。这些污染物中最常见的是 A．CO和SO2 B．HCHO和C6H6及其同系物 C．SO2和NO2 D．O3和Cl2 答案：【答案】 B 【解析】--- I hear a famous singer will give a concert this weekend,---Yes. We are all looking forward to her.A. SeeB. to seeC. sawD. seeing