问题 听力题

根据汉语或首字母提示完成单词拼写,要求语法正确,句子意义连贯。

小题1: The __________ (热心的)fans waited in the rain until their favourite star arrived at the airport.

小题2: The girl used to be          (尴尬、难堪)in public places, but now she can even make a speech in front of hundreds of people.

小题3:I’m sorry I ___________(误会)you. I thought what you said referred to me.

小题4:__________(严格)speaking, your handwriting is not so good in your composition.   

小题5:Our _________(以前的)English teacher is nothing like the present teacher in the senior high school.

小题6:I don’t think g____________ is more difficult to learn than chemistry.

小题7: If you have a d           of a famous university, it is easier for you to find a good job.

小题8:We are now living in the age of i         ,so we must learn to use the Internet?

小题9:Young people are always e        , in other words, they are full of life.

小题10:I will a           it if you help me when I am in trouble.

答案

小题1:enthusiastic

小题2:embarrassed

小题3:misunderstood

小题4:Seriously

小题5:previous

小题6:geography

小题7:diploma

小题8:information

小题9:energetic

小题10:appreciate

单项选择题
填空题

中国政府承诺,到2020年,单位GDP二氧化碳排放比2005年下降40%~50%。

(1)有效减碳的手段之一是节能,下列制氢方法最节能的是    。 

A.电解水制氢:2H2O2H2↑+O2

B.高温使水分解制氢:2H2O2H2↑+O2

C.太阳光催化分解水制氢:2H2O2H2↑+O2

D.天然气制氢:CH4+H2OCO+3H2

(2)CO2可转化成有机物实现碳循环。在体积为1 L的密闭容器中,充入1 mol CO2和3 mol H2,一定条件下反应:CO2(g)+3H2(g)CH3OH(g)+H2O(g) ΔH="-49.0" kJ/mol,测得CO2和CH3OH(g)的浓度随时间变化如图所示。

①从3 min到9 min,v(H2)=    mol/(L·min)。 

②能说明上述反应达到平衡状态的是    (填编号)。 

A.反应中CO2与CH3OH的物质的量浓度之比为1∶1(即图中交叉点)

B.混合气体的密度不随时间的变化而变化

C.单位时间内消耗3 mol H2,同时生成1 mol H2O

D.CO2的体积分数在混合气体中保持不变

(3)工业上,CH3OH也可由CO和H2合成。参考合成反应CO(g)+2H2(g)CH3OH(g)的平衡常数:

温度/℃0100200300400
平衡常数667131.9×12.4×11×1
 

下列说法正确的是    。 

A.该反应正反应是放热反应

B.该反应在升高温度时,CH3OH(g)的体积分数减小,说明v(CH3OH)减小,v(CH3OH)增大

C.在T ℃时,1 L密闭容器中,投入0.1 mol CO和0.2 mol H2,达到平衡时,CO转化率为50%,则此时的平衡常数为100

D.工业上采用稍高的压强(5 Mpa)和250 ℃,是因为此条件下,原料气转化率最高