通往L8AS—12.5型压缩机卸载油缸的油压化（）要高出98~147kPa。
A.排气压力
B.吸气压力
C.中间压力
D.低压级吸气压力
参考答案：C
—Let's go Dutch for this supper, OK?
—No，________this time, as a reward for all your help.
A．it's up to you
B．it's my treat
C．let's talk about it
D．it doesn't matter
组合机床自动线可以分为（）两大类。
A.卧式和立式
B.刚性自动线和柔性自动线
C.托盘搬运式和机器人搬运式
D.直接输送式和间接输送式
