问题
选择题
下列物质能与乙酸反应的是
A.镁
B.氧化铜
C.苛性钠
D.小苏打
答案
ABCD
镁是活泼金属,活泼金属大都能与非氧化性酸(盐酸,乙酸等)发生反应放出氢气。而氧化铜是碱性氧化物,碱性氧化物的通性中也有谈到能与酸反应生成盐和水。苛性钠为中学学的强碱之一,可与乙酸发生中和反应。小苏打化学名称为碳酸氢钠,可与乙酸反应放出二氧化碳,或者从水解的角度来理解,小苏打水溶液呈碱性,可与乙酸直接反应。
下列物质能与乙酸反应的是
A.镁
B.氧化铜
C.苛性钠
D.小苏打
ABCD
镁是活泼金属,活泼金属大都能与非氧化性酸(盐酸,乙酸等)发生反应放出氢气。而氧化铜是碱性氧化物,碱性氧化物的通性中也有谈到能与酸反应生成盐和水。苛性钠为中学学的强碱之一,可与乙酸发生中和反应。小苏打化学名称为碳酸氢钠,可与乙酸反应放出二氧化碳,或者从水解的角度来理解,小苏打水溶液呈碱性,可与乙酸直接反应。
信息匹配 阅读下列应用文及相关信息,并按照要求匹配信息. 首先请阅读下列演讲会的资料:
以下是想去听演讲的人员的基本信息.请把他们与适合他们的演讲内容匹配起来. 1. Alice is now studying in Beijing University, and she is especially interested in Chinese writing.In her spare time she enjoys drawing, writing poems and is fond of sharing her pieces with her classmates. 2. Simon comes from Egypt.He is now studying in Beijing Art Academy.He shows great interest in Chinese ancient characters.Now he wants to know much about it. 3. Lora and Peter, visiting professors from Australia, are both crazy about Chinese traditional culture.At weekends they like to call on Chinese families to learn about Chinese festivals as well as their history. 4. Edward is a senior student in Beijing Foreign Language University.He likes traveling very much and has made up his mind to work as an interpreter for some jointventure enterprises (合资企业). 5. Steve and Mark are both studying in the Chinese Department of China's Renmin University.They want to do some research on Chinese ancient literature. |