烤片机的蒸汽管路中的气动薄阀的作用是用来自动控制管路中的蒸汽流量的。
参考答案：对
影响接受者对文学“惯例”的理解程度的要素主要有（）
A、接受者的文本经验
B、权威人士的指导
C、接受者通过文学教育获得的有关文学的知识、理论
D、社会常识
E、自己的主观猜想
A decorator bought a bolt of defective cloth that he judged to be
usable, in which ease the cost would be $0.80 per usable yard. If it was later found that only
of the bolt could be used, what was the actual cost per usable yard
usable, in which ease the cost would be $0.80 per usable yard. If it was later found that only 
of the bolt could be used, what was the actual cost per usable yard