题目内容
【33】
查看答案
搜索结果不匹配？点我反馈
更多问题
听力原文： When my interest shifted from space to the sea, I never expected it would cause such confusion among my friends, yet I can understand their feelings. As I have been writing and talking about space flight for the best part of 20 years, a sudden switch of interest to the depth of the sea doer seem peculiar. To explain, I'd like to share my reasons behind this unusual change of mind. The first excuse I give is an economic one. Underwater exploration is so much cheaper than space flight. The first round-trip ticket to the moon is going to cost at least 10 billion dollars if you include research and development. By the end of this century, the cost will be down to a few million. On the other hand, the diving suit and a set of basic tools needed for skin-diving can be bought for 20 dollars. My second argument is more philosophical. The ocean, surprisingly enough, has many things in common with space. In their different ways, both sea and space are equally hostile. If we wish to survive in either for any length of time, we need to have mechanical aids. The diving suit helped the design of the space suit. The feelings and the emotions of a man beneath the sea will be much like those of a man beyond the atmosphere.
How did the speaker's friends respond to his change of interest？
While it is true that nuclear reactors do not produce visible smoke, it is certainly not 【25】______ that they do not pollute. And the pollution they produce is much more insidious precisely because it is 【26】______ .
【27】______ inconvenient it may be for governments to publish all the facts, they have no moral excuse for not doing so, 【28】______ they think they are acting in our best interest. At least some of the facts are known, even though they are not widely reported.
Nuclear reactors produce radioactive water and gases in vast 【29】______ . What 【30】______ all this waste？ It is 【31】______ concrete tanks and stored on tank farms. It is 【32】______ in disused salt mines. It is run into fractured rock. It is buried. It is 【33】______ about in special trains. But even when dumped, it has to be kept 【34】______ by sprinklers to stop it from boiling. And the contents of the tanks are, of course, extremely corrosive. The efforts of a fracture in the tank or a failure of the cooling system would be 【35】______ .
While every effort is made to 【36】______ that radioactive wastes do not escape into the sea or 【37】______ supplies of drinking water, such a leakage would be too horrible 【38】______ contemplate. But even then, governments would, presumably continue to belittle the hazards.
It seems that 【39】______ governments can get away with not telling the truth, they will continue to keep silent. Nevertheless the people 【40】______ to know the full facts. Do you know what happens to the radioactive waste in your country？ No？ Well—find out!
【21】
Where will Jane be in about one hour？
Why does the speaker ask the questions？
微信支付 
支付宝支付