Scottish inventor ____ modified and improved the design of steam engine and produced a very efficient one with rotary motion in 1765.
A.James Watt B.John Kay C.Richard Arkwright D.Samuel Crompton正确答案A
Scottish inventor ____ modified and improved the design of steam engine and produced a very efficient one with rotary motion in 1765.
A.James Watt B.John Kay C.Richard Arkwright D.Samuel Crompton正确答案A
