试题与答案

阅读表达。 阅读下面的短文,并根据短文后的要求答题(请注意问题后的字数要求).

题型:阅读理解

题目:

阅读表达。

阅读下面的短文,并根据短文后的要求答题(请注意问题后的字数要求).

     [1]You may be wondering what scientists are like. The aim of this article is to explore the characteristics that are common for scientists. You might even be considering becoming one yourself.

     [2]So now let's get to the topic. What type of person should a scientist be? Don't lose heart if you don't possess(拥有) all of these qualities, but having a few of them will be helpful.

     [3]A scientist should be someone who enjoys research and studying. This makes up a large part of a

scientist's work. Carrying out studies that will improve people's everyday life is an exciting challenge.

Moreover, making the next scientific discovery is highly rewarding but it takes a lot of work and

preparation.

     [4]If you come into contact with a scientist, one of the things you might notice is that they have an open mind. They are flexible and open to new possibilities and there is a very good chance that they might live

their life in this way.

     [5]Perseverance(毅力) is also a quality that is required for a scientist. Experiments don't always go to

plan. Each experiment needs to be adapted slightly to try and encourage more favourable outcomes. A

scientist cannot give up at the first difficulty.

     [6]          , most scientists seem to show curiosity. They seek answers to many mind-puzzling life

questions. Their job is usually to ask how, what and why things happen and to provide theories that

demonstrate this.

1. What is the text mainly about? (no more than 10 words)

                                                                              

2. Complete the following statement with words from Paragraph 2. (no more than 5 words)

It doesn't matter that you don't have all the qualities because having only      is beneficial.

3. How do scientists do their jobs? (no more than 15 words)

                                                                              

4. Please fill in the blank in Paragraph 6 with proper words. (no more than 3 words)

                                                                              

5. What does the word "This" (Line 1, Paragraph 3) probably refers to? (no more than 5 words)

                                                                              

答案:

1. The qualities of a scientist

2. a few of them

3. By asking how, what and why things happen and providing theories that demonstrate this.

4. Lastly / Finally / Besides

5. Enjoying research and studying

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题型:填空题

汽车尾气中含有NOx、CO及碳氢化合物,直接排入空气会造成大气污染,某研究性学习小组拟探究汽车尾气相关问题,请你参与并回答问题。

(1)有人建议汽车尾气中的CO,可用加入催化剂催化热分解的方法消除。已知热分解反应

CO(g)=c(s)+O2(g)的△H=+110.5kJ/mol,△S=-0.089kJ·mol-1.K-1,这一方案理论上是否可行,____________(选填:“可行”或“不可行”)。

  (2)有人提议在一定的条件下使NO、CO两种气体反应转变为N2和CO2,其方程式可表示为:2NO(g)+2CO(g)     N2(g)+2CO2(g) △H=-373.4kJ/mol.△S<0,又知该反应的平衡常数极大,常温下反应速率极小。

①上述反应的平衡常数表达式为:_________________________。

②下列有关说法正确的是_____________________________

A.减少CO和NO浓度的有效方法是加长汽车尾气排气管的长度

B.提高NO及CO转化率的有效方法是低温催化

C.汽车尾气中的NO主要是由于石油中含有大量的氮元素

D.使用催化剂,在适当温度和压力下有利干提高上述反应转化效率

(3)测定汽车尾气中NO,NO2的方法之一,用3%的H2o2溶液吸收生成HNO3,再用NaOH标准溶液滴定。若要确定尾气中NO,NO2体积分数总和,所需的数据有___________(选填序号)。

A.气体样品的体积                         B.NaOH标准溶液的浓度及所消耗的体积

C.从滴定开始到指示剂变色所需的时间       D.两种氮氧化物的体积比

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