题目

单缸四冲程汽油机完成一个工作循环，曲轴转过A. 720° B. 180° C. 150° D. 90° 答案：【答案】A【解析】完成一个工作循环，曲轴转过两圈，所以选A. －How do you like this DVD? －________．I enjoy it very much． [　　] A．It’s like a book． B．It’s not interesting at all． C．It’s about animals． D．It’s very funny．