往复式压缩机的运动部件主要包括()、()、()。
参考答案:曲轴、连杆、十字头
在操作序列push(1),push(2),pop,push(5),push(7),pop,push(6)之后,栈顶元素是 (29) ,栈底元素是 (30) 。
A.7 B.6 C.5 D.1
—How do you like studying in the new school?
—Not so good.________, I miss my former classmates.[ ]
A. To be honest
B. On the contrary
C. What's worse
D. In general