试题与答案

可逆反应:2NO22NO+O2在定容密闭容器中反应,达到平衡状态的标志是[ ]

题型:选择题

题目:

可逆反应:2NO22NO+O2在定容密闭容器中反应,达到平衡状态的标志是[ ]

①、单位时间内生成n molO2的同时生成2 nmolNO2

②、单位时间内生成n molO2的同时生成2 nmolNO

③、用NO2、NO、O2的物质的量浓度变化表示的反应速率之比为2:2:1的状态

④、混合气体的颜色不再改变的状态

⑤、混合气体的密度不再改变的状态

⑥、混合气体的平均相对分子质量不再改变的状态

A.①④⑥  

B.②③⑤  

C.①③④  

D.①②③④⑤⑥

答案:

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题型:阅读理解

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     The easiest way for the English to deal with their social discomfort is to avoid social interaction altogether,

by choosing either leisure (闲暇) activities that can be performed in the privacy of one's own house, or

outdoor activities that follow their interest without direct contact with anyone other than one's own family

members, such as going for a walk, or to the cinema, or shopping.

     In recent survey, over half of all the leisure activities were of this private domestic type, and of the top ten

pastimes, only two-having friends round for a meal or drink, and going to the pub-could be described as

"sociable". The most domestic activities are the most popular: watching TV, listening to the radio, reading,

DIY (Do It Yourself) and gardening. Even when the English are being sociable, the survey findings show that

most of them would much rather entertain a few close friends or relatives in the safety of their own homes

than venture out among strangers.

     In the latest national census survey (人口普查), over half of the entire adult male population had been

DIYing in the four weeks before the census date. Nearly a third of the female population had also been busily

improving their homes, and their work with their gardens was equally obvious: 52 percent of all English males

and 45 percent of females had been out there, cutting branches and weeding grass.

     Even among people claiming to belong to a particular religion, only two percent attend services every

week. The rest of the population can be found every Sunday at their local garden center or DIY superstore.

And when they want a break from caring about their own homes and gardens, they go on trips to visit bigger

and better houses and gardens, such as the stately homes and gardens opened to the public by the National

Trust and the Royal Horticulture Society. Visiting grand country houses always ranks as one of the most

popular national pastimes.

1. The result of the survey shows that ______. [ ]

A. about half English people enjoy working in their gardens

B. 8 out of 10 pastimes can be described as social activities

C. 2 percent of the religious people enjoy visits to public houses

D. visiting stately homes is the most popular national pastime

2. According to the passage, the English enjoy all of the following EXCEPT ______.

[ ]

A. the social activities, such as gathering with friends

B. working at home and in their gardens

C. dining out in a public place among strangers

D. visits to stately homes and gardens

3. The underlined word "domestic" probably means ______.[ ]

A. public

B. household

C. outdoor

D. collective

4. The passage mainly tells us about ______. [ ]

A. why the English don't like social activities

B. how the English spend their leisure time

C. what the result of a recent census survey is

D. where the English hold their private activities

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