题目

________on mobile phones for storing information that people are unable to remember basic things. A . Such is the dependence B . Such dependence does C . So they are dependent D . So do they depend 答案：A乙醇结构中氢氧键没有断裂的反应是A.乙醇和金属钠反应B.乙醇和浓硫酸加热至170℃C.乙醇、乙酸和浓硫酸共热D.乙醇溶液中插入热铜丝