【单项选择题】
Electricity （） by the Greeks a good many years ago.
A、A.was first found
B、B.was first discovered
C、C.has first been discovered
D、D.was seen first
查看正确答案A、11th B、12th C、13th D、14th
搜题
更多“Electricity （） by the Greeks a good many years ago.”相关的问题
第2题
[单选题] The most important features in the growth of American economy in the early 20th cenruty were（）
A、the use of steam and electricity as chief energy,the development of lare corporation and the development of railway B、the development of large corporation,urbanization and the employment in production of new technology C、the appearance of airplane,the use of electricity on a large scale and urbanization D、the rapid development of industry,railway and large cities
第3题
A、dividing the total longitudinal moment summations by displacement B、dividing th etotal vertical moment summation by displacement C、multiplying the MTC by the longituinal moments D、subtracting LCF from LCB
第4题
A、dividing the total longitudinal moment summations by displacement B、dividing th etotal vertical moment summation by displacement C、multiplying the MT1 by the longituinal moments D、subtracting LCF from LCB
第6题
A、In the 13th century a Black Rod went between the two Houses of Parliament for liaison and to discipline the members. B、In the 13th century Parliament only met by royal invitation. C、In the 13th century Parliament's role was to offer advice,not to make decisions. D、In the 13th century the most important part of Parliament was the House of Lords.
第8题
A、A.flow of petroleum through pipes B、B.spraying or splashing of petroleum C、C.settling of solids or water in petroleum D、D.All of the above
第9题
A、couducts electricity B、should be directed at the base of the fire C、is most effective on burning gases which are flowing D、extinguishes by cooling oil fires blow ignition temperature
