【判断题】商业银行的资产业务包括证券投资业务。()
【简答题】在煤中加入适量的生石灰()可制成供居民采暖用的“环保煤”,煤燃烧时生石灰吸收二氧化硫的化学方程式为: 2+2SO 2 +O 2 2CaSOx 请回答下列问题: ⑴按物质组成分类,煤属于__________; ⑵写出一个与上述反应的基本反应类型相同的化学方程式 ____________________________________; ⑶CaSOx中x的值为___________,其中钙...
【单选题】下列叙述中,你认为错误的是( )
A.
煤、石油、天然气是当今世界上最重要的三大矿物燃料
B.
从石油中可分离出汽油、柴油、煤油和酒精等燃料
C.
石油主要含有碳、氢两种元素,同时含有少量的硫、氧、氮等元素
【单选题】听力原文:M: Mary worked as a secretary for three years. Then she became a reporter. After that she began teaching in a high school. W: I know. And she has been doing nothing else ever since. Q: What is Ma...
【简答题】1.Aspirin is a but highly ______treatment. 2. Light clothes are _______ in
keeping cool in warm weather. 3. Mary turned out to be an secretary. 4. As we get older, our bodies
become less ______...