______modified and improved the design of the steam engine in 17

______modified and improved the design of the steam engine in 1765.
A、James Watt
B、Abraham Darby
C、Richard Arkwright
D、Henry Court
【正确答案】：A
【题目解析】：苏格兰发明家詹姆斯•瓦特修改并改良了设计方案，于1765年发明了转动的高效蒸汽机。