抑制尿酸生成的药物是（）
A.塞来昔布
B.秋水仙碱
C.别嘌醇
D.双氯酚酸
E.丙磺舒
参考答案：C
艺术发生的“心灵表现论”是由（）提出的。
A.罗杰·弗莱
B.克莱夫·贝尔
C.克罗齐
D.康德
An analyst does research about the classification of products. If income increases from $36 000 to $40000, and the quantity demanded for a product increase from 101 to 121, the product is best described as a(n):（）
A. necessity goods.
B. normal goods.
C. inferior goods.
