题目

生产、生活中离不开各类化学物质。下列化学物质中属于盐类的是A．乙醇            B．钻石            C．胆矾        D．生石灰  答案：C解析:略 —What is the ________ of his living every month? —About ￥800.A. cost B. money C. fare D. costs