问题详情

According to paragraph 2, Watts steam engine differed from earlier steam engines in each of the following ways EXCEPT:

A．It used steam to move a piston in a cylinder.

B．It worked with greater speed.

C．It was more efficient in its use of fuel.

D．It could be used in many different ways.

请帮忙给出正确答案和分析，谢谢！