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JamesWatt patented his separate-condenser steam engine in 1774,and its rotative version in 1781 ,cottonMillsWere its【B1】users,【B
JamesWatt patented his separate-condenser steam engine in 1774,and its rotative version in 1781 ,cottonMillsWere its【B1】users,【B
admin
2009-06-21
22
问题
JamesWatt patented his separate-condenser steam engine in 1774,and its rotative version in 1781 ,cottonMillsWere its【B1】users,【B2】it supplied reliable and【B3】power ofMule(轻型牵引机)spinning. In its turn the increasingly sophisticated technology required by the steam engine increased both its further【B4】—to locomotives in 1804, to shipping in 1812 and the development of theMachine--to industry, particularly associated【B5】HenryMaudslay and his【B6】of the screw cutting lathe. ThisMade possible the absolutely【B7】machining parts. From now on,Machine could【B8】themselves and be【B9】in ever-greater complexity. The standards of the 18th century clockmakerWere no longer an expensive skill, but part of the【B10】wisdom ofMechanics.
选项
A、spontaneous
B、chief
C、only
答案
B
解析
chief在这的意思是main。这一点可在下文中找到,因为短文紧接着提到了蒸汽机在其他方面的应用。
转载请注明原文地址:https://kaotiyun.com/show/GwMd777K
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