Although man has known asbestos (石棉) for many hundreds of ye
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Although man has known asbestos (石棉) for many hundreds of years, it was not until 160 years ago that it was mined for the first time on the North American continent. H.W.Johns, owner of a New York City Supply Shop for roofers, was responsible for the opening of that first mine. Mr.Johns was given a piece of asbestos which had been found in Italy. He experimented with the material and then showed its surprising powers to his customers. After putting on a pair of asbestos gloves, which looked much like ordinary work gloves, he took red-hot coals from the fireplace and played with them in his hands.How astonished the customers were to discover that he was not burned at all.You can well imagine that he had increasing business in asbestos roofing materials. However, because it was very expensive to transport them from Italy to the United States, Mr.Johns sent out a young scientist to seek a source nearer home. This young man found great vein(岩脉), in the province of Quebec in Canada. Ever since 1881 Quebec has led the world in the production of this unusual mineral, which is made up of magnesium, silicon, iron, and oxygen.When it is mined, the asbestos is heavy, just as you would expect a mineral to be.When it is separated, a strange thing happens: the rock breaks down into fine, soft, soapy fibres. Scientists do not know why the rock can be separated easily into threads, but they have found thousands of uses of this fireproof material, of the so-called “cloth of stone”. 小题1:Which title best expresses the main idea of this passage?
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小题1:C
小题2:D
小题3:A
小题4:D
the man also wrote hundreds of beautiful pieces of music for
many hundreds of 还是many hundred
many hundred还是many hundreds of
是many hundred of 还是many hundreds
英语翻译下面是关于石棉绒(Chrysotile asbestos)的几个句子,请翻译1.Guarantee fibre
The great man has been ___ for many years.(way )
many inventins_____ hundreds of years ago
Mr Dong has known the Kowloon Walled City for many years.In
Coffee has been a part of people's lives for thousands of ye
Coffee has been a part of people is life for thousands of ye
Coffee has been a part of people’s lives for thousands of ye
翻译句子,1.Dogs have been man*s best friends for thousands of ye