题目

 Here is a book. First_______ it and then tell me what you think of it. A. look for    B. look through    C. look up          D. look after 答案：B下列说法正确的是（　　） A、硫燃烧后生成有刺激性气味的气体B、铁丝伸入盛有氧气的集气瓶中剧烈燃烧C、红磷在空气中不能燃烧D、木炭燃烧后生成黑色固体