【单选题】
无纺贴墙布按照建筑内部装修材料燃烧性能等级划分为___
A. A级
B. B1级
C. B2级
D. B3级
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相关试题
【单选题】
墙布按照建筑内部装修材料燃烧性能等级划分为___
A. A级
B. B1级
C. B2级
D. B3级
【单选题】
复合壁纸按照建筑内部装修材料燃烧性能等级划分为___
A. A级
B. B1级
C. B2级
D. B3级
【单选题】
天然材料壁纸按照建筑内部装修材料燃烧性能等级划分为___
A. A级
B. B1级
C. B2级
D. B3级
【单选题】
人造革按照建筑内部装修材料燃烧性能等级划分为___
A. A级
B. B1级
C. B2级
D. B3级
【单选题】
实木饰面装饰板按照建筑内部装修材料燃烧性能等级划分为___
A. A级
B. B1级
C. B2级
D. B3级
【单选题】
胶合竹夹板按照建筑内部装修材料燃烧性能等级划分为___
A. A级
B. B1级
C. B2级
D. B3级
【单选题】
半硬质PVC塑料地板按照建筑内部装修材料燃烧性能等级划分为___
A. A级
B. B1级
C. B2级
D. B3级
【单选题】
PVC卷材地板按照建筑内部装修材料燃烧性能等级划分为___
A. A级
B. B1级
C. B2级
D. B3级
【单选题】
纯毛装饰布按照建筑内部装修材料燃烧性能等级划分为___
A. A级
B. B1级
C. B2级
D. B3级
【单选题】
经阻燃处理的其他织物按照建筑内部装修材料燃烧性能等级划分为___
A. A级
B. B1级
C. B2级
D. B3级
【单选题】
经阻燃处理的聚乙烯按照建筑内部装修材料燃烧性能等级划分为___
A. A级
B. B1级
C. B2级
D. B3级
【单选题】
聚丙烯按照建筑内部装修材料燃烧性能等级划分为___
A. A级
B. B1级
C. B2级
D. B3级
【单选题】
聚氨酯按照建筑内部装修材料燃烧性能等级划分为___
A. A级
B. B1级
C. B2级
D. B3级
【单选题】
聚苯乙烯按照建筑内部装修材料燃烧性能等级划分为___
A. A级
B. B1级
C. B2级
D. B3级
【单选题】
玻璃钢按照建筑内部装修材料燃烧性能等级划分为___
A. A级
B. B1级
C. B2级
D. B3级
【单选题】
化纤织物按照建筑内部装修材料燃烧性能等级划分为___
A. A级
B. B1级
C. B2级
D. B3级
【单选题】
木制品按照建筑内部装修材料燃烧性能等级划分为___
A. A级
B. B1级
C. B2级
D. B3级
【单选题】
燃烧是一种放热发光的___。
A. 化学反应
B. 物理反应
C. 光电反应
D. 分解反应
【单选题】
燃烧过程中的化学反应十分复杂，有___，有分解反应。
A. 氧化反应
B. 化合反应
C. 聚合反应
D. 连锁反应
【单选题】
可燃物质与___共存，达到某一温度时，与火源接触即发生燃烧。
A. 空气
B. 氧化剂
C. 助燃剂
D. 空气或氧化剂
【单选题】
凡是能与空气中的氧或其它氧化剂发生化学反应的物质称___。
A. 助燃物
B. 可燃物
C. 着火源
D. 易燃物
【单选题】
固体可燃物由于其分子结构的复杂性，物理性质的不同，其燃烧方式也不同，有蒸发燃烧、分解燃烧、表面燃烧和___四种。
【单选题】
___、磷、钾等单质固体物质着火后先熔融，后燃烧。
【单选题】
有些固体可燃物的蒸气压非常小或者难于发生热分解，不能发生蒸发燃烧或分解燃烧，当氧气包围物质的表层时，呈炽热状态发生无火焰燃烧，称为___。
A. 内部燃烧
B. 表面燃烧、
C. 放射燃烧
D. 阴燃
【单选题】
根据燃烧前可燃气体与氧___的不同，燃烧可分为两大类。
A. 混合时间
B. 混合浓度
C. 混合状况
D. 混合方式
【单选题】
___是指熔点较低的可燃固体，受热后熔融，然后像可燃液体一样蒸发成蒸气而燃烧。
A. 预混燃烧
B. 蒸发燃烧
C. 分解燃烧
D. 扩散燃烧
【单选题】
___、石蜡、松香等物质先熔融，后蒸发成蒸气，分解、氧化燃烧。
【单选题】
易燃和可燃液体的燃烧称为___。
A. 蒸发燃烧
B. 分解燃烧
C. 完全燃烧
D. 扩散燃烧
【单选题】
分子结构复杂的固体可燃物，受热分解出其组成成份及与加热温度相应的热分解产物，这些分解产物再氧化燃烧，称为___。
A. 蒸发燃烧
B. 分解燃烧
C. 完全燃烧
D. 预混燃烧
【单选题】
某些固体可燃物的蒸气压非常小或者难于发生热分解，当氧气包围物质的表层时，呈炽热状态发生无火焰燃烧，即___。
A. 表面燃烧
B. 放射燃烧
C. 蒸发燃烧
D. 扩散燃烧
【单选题】
天然高分子材料中的木材、棉、麻等物及合成高分子化合物中的热固塑料、合成橡胶、化学纤维等的燃烧，均属___。
A. 蒸发燃烧
B. 预混燃烧
C. 分解燃烧
D. 均相燃烧
【单选题】
阴燃在一定条件下，如果改变通风条件，增加供氧量或可燃物中水分蒸发到一定程度，也可能转变为___。
A. 有焰燃烧
B. 无焰烧烧
C. 自燃
D. 闪燃
【单选题】
在固体可物中，燃点较低、燃烧剧烈的称为___固体。
【单选题】
下列不是固体物质的燃烧方式是___。
A. 蒸发燃烧
B. 分解燃烧
C. 表面燃烧
D. 自燃
【单选题】
木炭、焦碳以及铁、铜、钨的燃烧均属___。
A. 表面燃烧
B. 蒸发燃烧
C. 分解燃烧
D. 阴燃
【单选题】
在燃烧反应过程中，如果生成的燃烧产物不能再燃烧，称为___。
A. 完全燃烧
B. 不完全燃烧
C. 充分、燃烧
D. 猛烈燃烧
【单选题】
在燃烧反应过程中，如果生成的燃烧产物还可再燃烧，则称为___。
A. 完全燃烧
B. 不完全燃烧
C. 分解燃烧
D. 扩散燃烧
【单选题】
燃烧完全与否不仅与空气供给量有关，而且还与___有关。
A. 其它可燃物扩散混合的均匀程度
B. 燃烧温度
C. 燃烧产物
D. 燃烧阶段
【单选题】
燃烧产物对灭火工作有利的方面是___。
A. 在一定条件下有阻燃作用
B. 引起人员中毒、窒息
C. 影响视线
D. 成为火势发展、蔓延的因素
【单选题】
通过烟的___等特征，消防人员可以大致判断燃烧物质的种类、火灾阶段、火势蔓延方向等。
A. 温度、浓度
B. 颜色变化
C. 扩散范围
D. 气味、颜色、浓度、流动方向
推荐试题
【单选题】
The underlined word "they" in the last sentence refers to __________.___
A. the trainers
B. the systems
C. the researchers
D. the dogs
【单选题】
The new law passed in Rome will ________.___
A. help improve fishing environment
B. stop people from catching goldfish
C. guarantee better conditions for goldfish
D. discourage keeping goldfish at home
【单选题】
People in Rome believe that the civilization of a city can be judged by _________.___
A. awareness of animal protection
B. exchanges with other cities
C. protection of ancient ruins
D. recognition of animal lovers
【单选题】
The underlined word "compassion" in Para 2 is the closest in meaning to __________.___
A. support
B. pity
C. help
D. love
【单选题】
People may break the law in Turin if they ________.___
A. keep their dogs or cats in cars
B. shut their dogs home all day long
C. raise their cats near ancient ruins
D. feed homeless animals in car parks
【单选题】
We can infer from the passage that _________.___
A. the owners can leave their dogs in hot cars
B. the cat only lives in modern life
C. the new law can prevent cruelty to animals
D. the new law gives recognition to the
people who feed homeless cat
【单选题】
If a person finds getting up early a problem, most probably ________.___
A. he is a lazy person
B. he refuses to follow his own energy cycle
C. he is not sure when his energy is low
D. he is at his peak in the afternoon or evening
【单选题】
Which of the following may lead to family quarrels according to the passage?___
A. Unawareness of energy cycles.
B. Familiar monologues.
C. A change in a family member's energy cycle.
D. Attempts to control the energy cycle of other family members.
【单选题】
If one wants to work efficiently at his low point in the morning, he should __________.___
A. change his energy cycle
B. overcome his laziness
C. get up earlier than usual
D. go to bed earlier
【单选题】
You are advised to rise with a yawn and stretch because it will __________.___
A. help to keep your energy for the day's work
B. help you to control your temper early in the day
C. enable you to concentrate on your routine work
D. keep your energy cycle under control all day
【单选题】
Which of the following statements is NOT true?___
A. Getting off to work with a minimum effort helps save one's energy.
B. Dr. Kletman explains why people reach their peaks at different hours of day.
C. Habit helps a person adapt to his own energy cycle.
D. Children have energy cycles, too.
【单选题】
An effective way to prevent the burnout of young athletes is __________.___
A. to increase their sense of success
B. to make sports less competitive
C. to reduce their mental stress
D. to make sports more challenging
【单选题】
According to the passage sport is positive for young people in that __________.___
A. it can help them learn more about society
B. it enables them to find flaws in themselves
C. it teaches them how to set realistic goals for themselves
D. it can provide them with valuable experiences
【单选题】
Many coaches and parents are in the habit of criticizing young athletes __________.___
A. without realizing criticism may destroy their self-confidence
B. in order to make them remember life's lessons
C. believing that criticism is beneficial for their early development
D. so as to put more pressure on them
【单选题】
According to the passage parents and coaches should __________.___
A. help children to win every game
B. pay more attention to letting children enjoy sports
C. train children to cope with stress
D. enable children to understand the positive aspect of sports
【单选题】
The author's purpose in writing the passage is _________.___
A. to persuade young children not to worry about criticism
B. to stress the importance of positive reinforcement to children
C. to discuss the skill of combining criticism with encouragement
D. to teach young athletes how to avoid burnout
【单选题】
As pointed out at the beginning of the passage, people used to think that air pollution _______.___
A. cause widespread damage in the countryside
B. affected the entire eastern half of the United States
C. had damaged effect on health
D. existed merely in urban and industries areas
【单选题】
As to the greenhouse effect, the author ________.___
A. share the same view with the scientist
B. is uncertain of its occurrence
C. rejects it as being ungrounded
D. thinks that it will destroy the world soon
【单选题】
The underlined word "offset" in the second paragraph could be replaced by _________.___
A. slip into
B. make up for
C. set up
D. catch up with
【单选题】
It can be concluded that ____________.___
A. raising the world's temperature only a few degrees would not do much harm to life on earth
B. lowering the world's temperature merely a few degrees would lead major farming areas to disaster
C. almost no temperature variations have occurred over the past decade
D. the world's temperature will remain constant in the years to come
【单选题】
This passage is primarily about __________.___
A. the greenhouse effect
B. the burning of fossil fuels
C. the potential effect of air pollution
D. the likelihood of a new ice age
【单选题】
What is the major function of paragraph 1?___
A. To arouse the reader's concern.
B. To introduce the theme of the whole passage.
C. To summarize the whole passage.
D. To state the primary uses of TV.
【单选题】
Television, as a source of entertainment, is ________.___
A. not very convenient
B. very expensive
C. quite dangerous
D. relatively cheap
【单选题】
Why are some people against TV?___
A. Because TV programs are not interesting.
B. Because TV viewers are totally passive.
C. Because TV prices are very high.
D. Because TV has both advantages and disadvantages.
【单选题】
One of the most obvious advantages of TV is that _________.___
A. it keeps us informed
B. it is very cheap
C. it enables us to have a rest
D. it controls our lives
【单选题】
According to the passage, whether TV is good or not depends on ___________.___
A. its quality
B. people's attitude towards it
C. how we use it
D. when we use it
【单选题】
What regulation was issued by New York State concerning beverage containers?___
A. A fee should be charged on used containers for recycling.
B. Throwaways should be collected by the state for recycling.
C. Consumers had to pay for beverage containers and could get their money back on returning them.
D. Beverage companies should be responsible for collecting and reusing discarded plastic soda bottles.
【单选题】
The returned plastic bottles in New York used to _____________.___
A. be turned into raw materials
B. be separated from other rubbish
C. have a second-life value
D. end up somewhere underground
【单选题】
The key problem in dealing with returned plastic beverage containers is ______________.___
A. how to reduce their recycling costs
B. to sell them at a profitable price
C. how to turn them into useful things
D. to lower the prices for used materials
【单选题】
Recycling has become the first choice for the disposal of rubbish because ______________.___
A. recycling causes little pollution
B. other methods are more expensive
C. recycling has great appeal for the jobless
D. local governments find it easy to manage
【单选题】
It can be concluded from the passage that ____________.___
A. recycling is to be recommended both economically and environmentally
B. local governments in the U.S. can expect big profits from recycling
C. rubbish is a potential remedy for the shortage of raw materials
D. landfills will still be widely used for waste disposal
【单选题】
The author chose to study engineering at a small liberal-arts university because he ________.___
A. intended to be a sensible student with noble ideals
B. wanted to be an example of practicality and rationality
C. intended to be a combination of engineer and humanist
D. wanted to coordinate engineering with liberal-arts courses in college
【单选题】
According to the author, by interacting with people who study liberal arts, engineering students can __________.___
A. broaden their horizons
B. receive guidance in their careers
C. become noble idealists
D. balance engineering and the liberal arts
【单选题】
In the eyes of the author, a successful engineering student is expected ______________.___
A. to be imaginative with a value system to guide him
B. to be a technical genius with a wide vision
C. to have an excellent academic record
D. to be wise and mature
【单选题】
The author's experience shows that he was ________.___
A. creative
B. ambitious
C. irrational
D. unrealistic
【单选题】
The underlined word "they" in "... together they threaten to confuse." (Para.5) refers to ____________.___
A. practicality and rationality
B. engineering and the liberal arts
C. reality and noble ideals
D. flexibility and a value system
【单选题】
It can be learned from the passage that the Ouchidas' house __________.___
A. failed to meet energy conservation standards
B. was designed and constructed in a scientific way
C. is well worth the money spent on its construction
D. is almost faultless from the point of energy conservation
【单选题】
What made the Ouchidas' new house a horrible dream?___
A. Lack of fresh air.
B. Gas leakage in the kitchen.
C. The newly painted walls.
D. Poor quality of building materials.
【单选题】
The underlined word "accentuate" (Para. 3) most probably means "________".___
A. worsen
B. accelerate
C. relieve
D. improve
【单选题】
Why were cracks in old houses not a big concern?___
A. Because environmental protection was given top priority.
B. Because indoor cleanness was not emphasized.
C. Because they were technically unavoidable.
D. Because energy used to be inexpensive.
