()是内燃机实现工作循环完成能量转换的主要机构。
参考答案:曲柄连杆机构
“三、二、一”产业中,属于第三产业的是( )
A.渔业
B.交通运输
C.水的生产和供应业
D.建筑业
The risk-free rate is 5 percent, the market rate is 12 percent, and the beta of a stock is 0.5, what would happen to the required rate of return if the inflation premium increased by 2 percent It would:()
A. increase to 15.
B. decrease to 8.5.
C. increase to 10.5.