问题 阅读理解

阅读理解

    These fast food restaurants constantly remind us of the American fondness with hamburgers,chips

and pizza.But America's reputation as the home of fast food is under threat from the British,according

to a research carried out by the BBC in 13 nations among 9,000 people.

    Despite fears over obesity,the study found the British are more obsessed with junk food than any

other nation.

    Almost half of British respondents(参与调查者)said they enjoyed fast food too much to give it up.

About 44 percent in the US claimed they would be unable to stop eating burgers,pizzas and chicken

wings,making the country second in the world's junk food league. The third place went to the United

Arab Emirates,where 35 percent are junkfood lovers.

    The research also found that attitudes to food and weight vary wildly around the world. Those in the

UK and US believed lack of selfdiscipline was the main factor behind growing waistlines(腰围). They

can't deny themselves that hamburger or extra piece of pizza,but "make themselves feel better by

washing it down with a diet coke",the study suggested.

    The French,on the other hand,seem to keep a watchful eye on their weight. They get on the scales

every day. Only 19 percent of the French surveyed admitted a fondness for fast food.

    Thierry Pailleux,of France,from the market research firm that conducted the poll,said the French

valued the combination of good food and company. Sharing classic food and time with loved ones is

key to the French sensibility. "French people take care of their image as a matter of course. Being thin

is part of our culture and a point of pride. We are known for it," said Pailleux."On top of this,there is

increasing awareness of the devastation(伤害)that obesity can cause to one's health."

1. What's the main idea of the passage?

A. A study of different attitudes towards fast food.

B. How popular fast food is in foreign countries.

C. Different countries' attitudes towards food and body weight.

D. A study of how popular fast food is in foreign countries.

2. The research shows that ________.

A. Americans are proud of the fast foods they eat

B. those British who love fast foods do not care about their body weight

C. the British would like to think that other foods they eat make up for eating occasional fast food

D. most Americans believe the enjoyment of food is more important than its possible effect on their

    waistlines

3. What's the meaning of the underlined word "obsessed" in the second paragraph?

A. Crazy.  

B. Obese.  

C. Opposed.  

D. Neutral.

4. Why are,according to Thierry Pailleux,the French less obsessed with fast food than the British

    and Americans?Because ________.

A. they value their image

B. they have better foods than other countries

C. they value selfdiscipline

D. they are afraid of having an unhealthy diet

答案

1-4: DCAA

选择题
填空题

氮是地球上含量丰富的一种元素,氨、肼(N2H4)和叠氮酸都是氮元素的重要氢化物,在工农业生产、生活中有着重大作用。

(1)合成氨生产技术的创立开辟了人工固氮的途径,对化学工业技术也产生了重要影响。

①在固定体积的密闭容器中,进行如下化学反应:N2(g)+3H2(g)2NH3(g) ΔH<0,其平衡常数K与温度T的关系如下表。

T/K298398498
平衡常数K4.1×106K1K2
 

则该反应的平衡常数的表达式为________;判断K1________K2(填“>”、“<”或“=”)。

②下列各项能说明该反应已达到平衡状态的是________(填字母)。

a.容器内N2、H2、NH3的浓度之比为1∶3∶2

b.v(N2)=3v(H2)

c.容器内压强保持不变

d.混合气体的密度保持不变

③一定温度下,在1 L密闭容器中充入1 mol N2和3 mol H2并发生上述反应。若容器容积恒定,10 min达到平衡时,气体的总物质的量为原来的,则N2的转化率为________,以NH3的浓度变化表示该过程的反应速率为________。

(2)肼可用于火箭燃料、制药原料等。

①在火箭推进器中装有肼(N2H4)和液态H2O2,已知0.4 mol液态N2H4和足量液态H2O2反应,生成气态N2和气态H2O,放出256.6 kJ的热量。该反应的热化学方程式为________________________________________________________________________。

②一种肼燃料电池的工作原理如图所示。该电池工作时负极的电极反应式为_____________________________________。

③加热条件下用液态肼(N2H4)还原新制Cu(OH)2来制备纳米级Cu2O,同时放出N2。该反应的化学方程式_______________________________________。

肼与亚硝酸(HNO2)反应可生成叠氮酸,8.6 g叠氮酸完全分解    可放出6.72 L氮气(标准状况下),则叠氮酸的分子式为________。