空分装置在启动过程中要处理好()和气体的生产和分配这两方面的关系。
参考答案:冷量的生产和分配
Will you go on a picnic with us tomorrow?()
A.Yes, but I‘ll have English classes
B.Sorry. I have an appointment with Dr. Brown
C.I‘m afraid I have no idea
D.I won‘t. it‘s kind of you
依离片基由近到远的J顷序,彩色负片的主要涂层分布情况是()
A.底层
B.防光晕层
C.隔层
D.乳剂层
E.保护层