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【简答题】
二氧化碳碳捕获与封存技术(CCS)可以减少化石燃料燃烧以及其他工业用途的二氧化碳排放量,从而有助于减少温室气体的排放.该技术引起了各国的普遍重视. Ⅰ.目前工业上有一种方法是用CO 2 来生产燃料甲醇.为探究反应原理,现进行如下实验,在体积为1L的密闭容器中,充入1molCO 2 和3molH 2 ,一定条件下发生反应: CO 2 (g)+3H 2 (g)?CH 3 OH(g)+H 2 O(g)△H=-49.0kJ/mol测得CO 2 和CH 3 OH(g)的浓度随时间变化如图1所示. ①从反应开始到,氢气的平均反应速率v(H 2 )=______mol/(L?min). ②下列措施中能使n(CH 3 OH)/n(CO 2 )增大的是______. A.升高温度B.充入He(g),使体系压强增大 C.将H 2 O(g)从体系中分离 D.再充入1molCO 2 和3molH 2 . Ⅱ.工业上也可以通过下列反应①和②,用CH 4 和H 2 O为原料来制备甲醇. ①CH 4 (g)+H 2 O(g)?CO(g)+3H 2 (g)△H1;②CO(g)+2H 2 (g)?CH 3 OH(g)△H 2 将0.20molCH 4 和0.30molH 2 O(g)通入容积为10L的密闭容器中,在一定条件下发生反应①,达到时,CH 4 的转化率与温度、压强的关系如图2. (1)温度不变,缩小体积,增大压强,①的反应速率______(填“增大”、“减小”或“不变”),向______方向移动. (2)反应①的△H 1 ______0(填“<”、“=”或“>”),其常数表为K=______,压强为P 1 ,100℃时的常数值是______.
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【判断题】任务越难的学习内容,越需要更高的学习动机
A.
正确
B.
错误
【简答题】当插入语句中指定列名列表时,必须指定数据表的 列 。
【单选题】1997年以来,黄河每年都有断流现象。据有关部门的不完全调查分析,从1972年到1996年,黄河下游因断流和供水不足造成工业累计直接经济损失约268亿元。这说明的哲学道理是( )。
A.
事物之间存在因果联系
B.
任何事物的质变都是由量变引起的
C.
矛盾的主要方面规定着事物的性质
D.
事物的变化发展是内外因共同起作用的结果
【单选题】获得休息的先决条件是( )
A.
减少紧张
B.
生理上的舒适
C.
充足的睡眠
D.
减少焦虑
【单选题】unlike business process reengineering, business process management
A.
seeks incremental change
B.
seeks radical change
C.
increases the financial risk associated with change
D.
has a longer implementation time
【单选题】According to the business process modeling notation, the end of a business process is symbolized by a ________.
A.
circle having a thick border
B.
circle having a narrow border
C.
square having a thick border
D.
square having a narrow border
【单选题】Which of the following statements is true of business process reengineering?
A.
It is a very fast process and is easy to carry out.
B.
When combined with ERP, it has a 100 percent success rate.
C.
It is a very expensive process.
D.
Due to its streamlined process, it requires no expertise.
【单选题】获得休息的最基本的先决条件是
A.
充足的睡眠
B.
良好的物理环境
C.
生理上的舒适
D.
心理上的放松
E.
梦境的出现
【单选题】The process of closing the business, selling the assets, paying the liabilities, and disbursing remaining cash to the owners is called______.
A.
withdrawal
B.
liquidation
C.
acquisition
D.
dissolution
【单选题】Which of the following statements is true about roles in a business process?
A.
Activities of a business process are made up of roles.
B.
An employee can be associated with only one particular role.
C.
The name of the role is written at the top of the swimlane.
D.
A given role should be fulfilled by just one person.
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