分析美学家莫里斯•韦兹的代表作是（）
A、《艺术哲学》
B、《美学》
C、《美学问题》
D、《论美学》
参考答案：C
1MPa=（）kgf/cm2
A.10.2
B.10.02
C.0.98
D.0.098
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 ？（）
A.$0.60
B.$0.90
C.$1.00
D.$1.20
E.$1.70
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 ？（）