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【多选题】
社会阶层的单一指标划分法,有以下哪项指标?A.
教育
B.
职业
C.
收入
D.
房产
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】固体分散体常用的载体材料主要有（）、难溶性载体材料和肠溶性载体材料三类。
【单选题】在室温下,下列物质分别与硝酸银的氨溶液作用能立即产生沉淀的是
A.
CH 3 (CH 2 ) 2 C≡CH
B.
CH 3 C≡CCH 2 CH 3
C.
(CH 3 ) 2 CHC≡CCH 3
D.
CH 2 =C(CH 3 )CH=CH 2
【单选题】The economic profit of a perfectly competitive firm
A.
is less than its total revenue.
B.
equals its total revenue.
C.
is greater than its total revenue.
D.
is less than its total revenue if its supply curve is inelastic and is greater than its total revenue if its supply curve is elastic.
【简答题】固体分散体常用的载体材料有 、 和 。
【单选题】Suppose firms in a perfectly competitive market are earning an economic profit. As new firms enter, the price ________ and the economic profit of each existing firm ________.
A.
rises; increases
B.
rises; decreases
C.
falls; increases
D.
falls; decreases
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