题目内容
听力原文： Good morning. This morning we are continuing our look at Australia and its natural problems. Australia is a dry continent, second only to Antarctica in its lack of rainfall. Long hours of hot sunshine and searing winds give Australia an extremely high rate of evaporation, for more than in most other countries. It is estimated that approximately 87% of Australia's rainfall is lost through evaporation, compared with just over 60% in Europe and Africa and 48 % in North America.
Remarkably, underground water sources in Australia supply about 18% of total water consumption. So you can see it is quite an important source of water in this dry land.
So most of the consumption of water in Australia comes form. water which is kept above ground. More than 300 dams regulate river flows around the country. The dams store water for a variety of functions, the rural irrigation of crops, without which many productive areas of the country would not be able to be farmed; the regulation of flooding, a serious problem which will be dealt with later in the course; and last but not least, the harnessing of the force of gravity for the generation of electricity.
The driest continents is______.
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Space is filled with radiant energy and beyond earth's atmosphere this energy flow steadily and intensely from the sun. An abundant and essential【C1】______of energy would be used in space by developing satellite solar【C2】______stations. To live in space, humans must be protected【C3】______the fierce intensity and penetrating sunlight. The colony will have to have enough energy to【C4】______a fairly uniform. temperature. The sun is not dimmed【C5】______an atmosphere. Shaded materials not【C6】______to direct sunlight will almost be absolute zero, while the temperature can soar above the【C7】______point. The colony will need to have both heaters and【C8】______Fortunately, sun's energy can be converted【C9】______electricity. Converting sun's energy, we would【C10】______stations in the space that would intercept【C11】______sunlight. The stations intercept enough sunlight to【C12】______five nuclear reactors and they could be as【C13】______as nine miles long and four miles wide while they weigh twenty thousand tons. This is a【C14】______free way to generate electricity and cost no【C15】______than coal or nuclear energy. Solar cells do the actual converting. A useful material found in lunar soil is silicon which is used to make solar cells.【C16】______we can produce a large amount of these cells and then we avoid any problems of【C17】______the material from earth. A solar cell is made from two thin layers of silicon. Sunlight【C18】______on the cell shakes the electrons【C19】______, and then these electrons move off into an outside circuit, which is detected as an electrical current. Things are arranged【C20】______most of the work involved in generating the electricity is done by forces associated with the atoms themselves.
【C1】
As is explained in the passage, snapshots refer to ______.
What does the last paragraph in the passage suggest？
听力原文：W: There are a lot of things that you cannot control in this world, is that right？
M: Exactly. So you just keep going forward. You keep going, endure and perhaps something good will come of it.
W: What should be done if you want success？
M: You go to work hard, real hard. If you/are really an expert, maybe something bad will not come of it.
W: Do you think nothing is as good as you want because of other people's perception？
M: No, I think one may overestimate their abilities. That is the problem.
W: What do you mean by that？
M: Put it this way, you should never take it for granted your abilities, be whatever they are, they can not alone decide what will come of them.
W: Can you give me an example？
M: Well, take a performance in a film for example, there are so many other people involved. The performance is pretty much controlled by the editing. You're now relying on the editor and the director. If you're editing the film, you're relying on the actor and the support team and on the terrible hand; you might not be doing enough.
W: It sounds like, with whatever you do in the world, there are so many factors that you can't control.
M: Absolutely.
According to the man, which one is NOT the possible factor of success？
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