题目内容
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A.初起期是火灾从无到有开始发生阶段，这一阶段可燃物的热解过程至关重要
B.发展期是火势由小到大的发展阶段，这--阶段通常满足时间平方规律，即火灾热释放速率随时间的平方非线性发展,回燃就发生在这一阶段
C.最盛期的火灾燃烧方式是通风控制火灾，火灾的大小由建筑物的通风情况决定
D.熄灭期是火灾由最盛期开始消减直至熄灭的阶段，熄灭的原因可以是燃料不足、灭火系统的作用等
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B.原始燃料是气体或液体,不能产生固体颗粒
C.有焰燃烧产生的烟气颗粒几乎全部由固体颗粒组成
D.碳素材料阻燃生成的烟气与该材料加热到热分解温度所得到
B.stood by
C.stood for
D.stood out
His father was a doctor, so Darwin was sent to Edinburgh to study medicine, and was planned to follow a medical career. But Charles found the lectures were very boring. Then his father sent him to Cambridge University to study to be a priest. While at Cambridge, Darwin' s interest in zoology and geography grew. Later he got a letter from Robert FitzRoy who was planning to make a voyage around the world on a ship, the Beagle. He wanted a naturalist to join the ship, and Darwin was recommendeD.That voyage was the start of Darwin' s great life.
As the Beagle sailed around the world, Darwin began to wonder how life had developed on earth. He began to observe everything. After he went back home, he set to work, getting his collections in order.
His first great work The Zoology of the Beagle was well received, but he was slow to make public his ideas on the origins of life. He was certainly very worried about disagreeing with the accepted views of the Church.
Hapily, the naturalists at Cambridge persuaded Darwin that he must make his ideas publiC.So Darwin and Wallace, another naturalist who had the same opinions as Darwin, produced a paper together.
A year later Darwin's great book On the Origin of Species by Means of Natural Selection appeareD.It ttracted a storm. People thought that Darwin was saying they were descended from monkeys. What a shameful idea!
Although most scientists agreed that Darwin was right, the Church was still so strong that Darwin never received any honors for his work.
Afterwards, he published another great work, The Descent of Man. His health grew worse, but he still workeD."When I have to give up observation, I shall die," he saiD.He was still working on 17 April, 1882. He was dead two days later.
Darwin' s theory of evolution is that all life is related and has originated from the common ancestor. Birds and bananas, fish and flowers - all is relateD.Darwin' s general theory presumes the development of life from non-life and stresses a purely naturalistic "descent with modification" . That is, complex creatures evolve from simple ancestors naturally over time. In a nutshell, as random genetic mutations occur within an organism' s genetic code, the beneficial changes are passed on to the next generation. Over time, these changes accumulate and the result is an entirely different organism.
Ancient Greek philosophers such as Anaximander postulated the development of life from non-life and the evolutionary descent of man from animals. Charles Darwin simply brought something new to the old philosophy -a plausible mechanism clled "natural election. Suppose a member developed a functional advantage (it grew wings and learmned to fly), its ofpring would inherit that advantage and pass it on to their offspring. The inferior members of the same species would gradually die out, leaving only the superior members of the species.
Natural selection is the reservation of a functional advantage that enables a species to compete better in the world.
Charles Darwin' s theory has made an enormous impact on the worlD.It has aroused controversy, while at the same time creating a new form. of scientific thought. The greatest controversy involves Darwinism' s clashing views with creationism. Creationism is the broad range of beliet involving God' s intervention, which also explains the origin of the universe, life, and different kinds of plants and animals on earth.
Darwin' s theory also has great influence on modern science. His theory of evolution by natural selection has provided us with a possible answer to where we came from. It gives new meanings to professions such as anthropology and genetics.
46. Which of the following is NOT true about young Darwin?
A.His father wanted him to work at church.
B.He was sent to Cambridge to study zoology.
C.He liked to cllect interesting things.
D.Darwin was not very clever when he was young.
47. Darwin' s father sent him to Edinburgh to.
A.make him like natural history
B.have him give up his cllctin
C.let him change his hobbies
D.make him become a doctor
48. According to the passage, Charles Darwin' s whole life was changed by_
A.his study at Cambridge University
B.his cllection of coins
C.the ntulits at Cambridge
D.the voyage of the Beagle
49.What happened when Darwin published his first great work The Zoology of the Beagle?
A.He wrote a research paper on the origin of lite and published at once.
B.He received criticism from the naturalists at Cambridge.
C.He hesitated and did not show his opinions to the public immediately.
D The naturalists at Cambridge persuaded him to comprise with the church.
50. Why did Darwin never receive an honor?
A.Because the Church held strong disagreement with him.
B.Because his achievements are not significant enough.
C.Because the goverment didn' t like his opinions.
D.Because he would not accept any honors for his work.
A、一个成员函数在类体外定义，则该成员函数默认是内联函数
B、一个成员函数在类体中定义，则该成员函数默认是内联函数
C、在类体外定义成员函数需要使用::运算符指明该成员函数属于哪个类
D、类体外定义的成员函数默认为公有成员函数
B.厂房的人均使用面积不少于3.5m2
C.厂房主通道不少于1.2m,其他通道宽度不少于1.0m
D.厂房门应向外开、门内无插销、门宽不少于1.2m
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