假如一家完全竞争企业的产量为150件，价格为每件10元，那么，它的边际收入为：
   A．1500元    B．10元
   C．15元    D．不好确定

A．He made numerous popular movies.B．He has long been a legendary figure.C．He was best at acting in Hollywood tragedies.D．He was the most successful actor of his time. 点击查看答案

PEG比浊沉淀法检测CIC的特异性（）

A.最好，不受干扰
B.较差，易受干扰
C.较好，不受干扰
D.最好，易受干扰

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