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【单选题】
II Reading Comprehension (25 minutes)Section ADirections:In this part there is a passage with ten blanks. You are required to select one word for each blank from a list of choices given in a word bank following the passage. Read the passage through carefully before making your choices. Each choice in the bank is identified by a letter.注意:请在答题处填入相应的字母编号!字母一定要大写!College isn't the only place where information exists. You can learn in a library. But somebody handing you a book doesn't 11________ foster learning. You want to learn with other people, ask questions, try out ideas and have a way to 12________ your ability. It usually takes more than just a book.Education should be 13________, although it's fine to have deep interests, too.In high school there were 14________ when I was highly focused on writing software, but for most of my high school years I had wide-ranging academic interests. My parents encouraged this, and I'm 15________ that they did.Although I 16________ a lot of different kinds of classes in college, I 17________ up for only one computer class the whole time. I read about all kinds of things.One parent wrote me that her 15-year-old son "lost himself in the hole of the computer." He got an A in website design, but other grades were 18________, she said.This boy is making a mistake. High school and college offer you the best 19________ to learn broadly—math, history, various sciences—and to do projects with other kids that teach you first-hand about group 20________. It's fine to take a deep interest in computers, dance, language, or any other discipline, but not if it jeopardizes breadth.
A.
chance
B.
broad
C.
recruited
D.
attended
E.
frequently
F.
dynamics
G.
filling
H.
automatically
I.
sinking
J.
periodsK. test L. signedM. genuinelyN. gratefulO. limited11. _________
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【简答题】在一定体积的密闭容器中,进行如下化学反应: CO 2 (g) + H 2 (g) CO(g) + H 2 O(g) ,其化学平衡常数 K 和温度 t 的关系如表所示: t / °C 700 800 830 1 000 1 200 K 0.6 0.9 1.0 1.7 2.6 回答下列问题: (1) 该反应的化学平衡常数表达式为 K = 。 (2) 该反应为 ( 填“吸热”或“放热” ) 反应...
【单选题】迟滞电压比较器的门限电压值有 ( )
A.
1 个
B.
2 个
C.
3 个
D.
4 个
【单选题】已知反应2 COF 2 (g) → CO 2 (g) + CF 4 (g) 的△H > 0,在某温度下达到平衡时,有6摩 尔的CO 2 ,3摩尔的COF 2 和3摩尔的CF 4 。下列叙述中不正确的是( )。
A.
平衡位置不受压力变化的影响
B.
平衡位置不受温度变化的影响
C.
此时K p = K c = 2
D.
此时反应的 △G T = 0
【单选题】一定温度下 , 在某恒容的密闭容器中 , 建立化学平衡 :C(s)+H 2 O(g) CO(g)+H 2 (g) 。下列叙述中 不能 说明该反应已达到化学平衡状态的是 ( ) 。
A.
体系的压强不再发生变化
B.
v 正 (CO)= v 逆 (H 2 O)
C.
生成 n mol CO 的同时生成 n mol H 2
D.
1 mol H—H 键断裂的同时断裂 2 mol H—O 键
【简答题】CO2+H2=可逆=CO(g)+H2O(g),其化学平衡常数K和温度t的关系如下表: T/°C 700 800 830 1 000 1 200 K 0.6 0.9 1.0 1.7 2.6 回答下列问题: (1)反应为________反应(填“吸热”或“放热”)。 2)某温度下,各物质的平衡浓度符合下式:3c(CO2)·c(H2)=5c(CO)·c(H2O),试判断此时的温度为________oC。...
【单选题】下列哪一项不是可转换债券的特点( )。
A.
具有融资的灵活性
B.
融资成本高
C.
可以延缓股本的直接计入,从而缓解对业绩的稀释
D.
发行可转换债券可以获得比直接发行股票更高的股票发行价格,可以募集更多资金
【简答题】(1)在一定温度下,有下列反应发生:Fe 2 O 3 (s)+3CO(g)?2Fe(s)+3CO 2 (g) ①该反应的平衡常数表达式K=______. ②该温度下,在2L盛有Fe 2 O 3 粉末的密闭容器中通入CO气体,10min后,生成了单质铁11.2g.则10min内CO的平均反应速率是______. ③请用上述反应中某种气体的有关物理量来说明该反应已达到平衡状态: a.______;b....
【单选题】某温度时,下列反应已达到平衡:CO(g)+H2O(g)==CO2(g)+H2(g),其△rHmΘ<0,为使平衡向右移动,应.( )。
A.
增加总压、降低温度
B.
升高温度、降低总压
C.
使用催化剂
D.
降低温度、增加H2O(g)的浓度
【判断题】迟滞电压比较器中引入了负反馈,它有两个门限电压
A.
正确
B.
错误
【单选题】某温度时,下列反应已达到平衡 CO(g)+H2O(g)=CO2 (g)+H2 (g) , D H q <0 ,为要提高 CO 的转化率,可采取方法
A.
增加总压力
B.
减少总压力
C.
升高温度
D.
降低温度
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