A:该反应为吸热反应
B:1mol CO2(g)和1mol H2(g)反应生成1molCO(g)和1mol H2O(g)要放出41kJ热量
C:反应的热化学方程式是:CO(g) + H2O (g) = CO2(g) + H2(g)△H=+41kJ/mol
D:CO(g)与H2O(g)所具有的总能量大于CO2(g)与H2(g)所具有的总能量
2016年4月,******指出,“一带一路”建设是我国在新的历史条件下实行全方位对外开放的重大举措、推行互利共赢的重要平台。其中的“一带”是指“丝绸之路经济带”。在宋元时期,丝绸之路是( )
新形势下,党员干部的权力只能围着党和人民“公转”,而不是围着个人利益“自转”。这是因为( )
下列是几种常见的单细胞生物结构示意图。有关该组生物的叙述错误的是( )
Computers are very important to modern life. Many people think that in the future computers will be used a lot in everyday’s life. It is thought that we won’t have to go shopping because we will be able to get most things which are sold in shops on the Internet. There will be fewer books because we will be able to get all texts from computers. The Internet will be used to play games, see films and buy food. Most telephone calls will be made by computers, too. Some people are glad about these new ways of shopping and communicating(交际). Others do not think that computers will replace(代替) our old ways. Let’s take books for example. Some people think that one day we won’t read books made of paper. Instead, we will buy and read books using computers. We will read texts on small pocket computers. The computers will keep many different books in them at the same time. We won’t need to turn lots of pages and paper will be saved. Computerized books will be used more and more. Is Internet shopping such a pleasure as going to the shop? Many people say it is not. It is a pleasure to go into shops and look at things you want to buy. It is also unlikely(不大可能) that many people will want to read large texts on our computers. Because paper books will perhaps be more friendly. Maybe computers won’t change these two habits(习惯).