题目

Spring is coming, and it is time for those about to graduate to look for jobs. Competition is tough, so job seekers must carefully consider their personal choices. Whatever we are wearing，our family and friends may accept us, but the workplace may not. A high school newspaper editor said it is unfair for companies to discourage visible tattoos (纹身）nose rings, or certain dress styles. It is true you can’t judge a book by its cover, yet people do “cover” themselves in order to convey certain messages. What we wear, including tattoos and nose rings, is an expression of who 根据图片中的信息回答下列问题：（1）醋酸的化学式为                     ；（2）树木上涂刷石灰浆的作用是           ；（3）用炉具清洁剂去除油污是因为         。