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【单选题】
下列培养基成分中,通常可以作为微生物氮源的是( )。A.
蛋白质
B.
维生素
C.
葡萄糖
D.
琼脂
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举一反三
【简答题】A man once said how useless it was to put advertisements in the newspapers．“last week, ” said he, “my umbrella was stolen from a London church．As it was a present, I spent twice its worth in advertisi...
【多选题】马克思指出,“处于流动状态的人类劳动力或人类劳动形成价值,但本身并不是价值。它在凝固的状态中,在物化的形式上才形成价值。这就是说,要把人类抽象劳动,凝结在一定的物体里面,即一定的对象里,它才形成价值。”这说明
A.
价值是商品的本质属性
B.
价值是由抽象劳动形成的
C.
价值体现商品生产者相互交换劳动的关系
D.
价值是交换价值的内容和基础
【简答题】A man once said how useless it was to put advertisements in the newspaper. “Last week, ” he said, “my umbrella was stolen from a London church. As it was a present, I spent twice its worth in advert...
【简答题】A man once said how useless it was to put advertisements in the newspapers. 'Last week,' said he, 'my umbrella was stolen from a London church. As it was a present, I spent twice its worth in advertis...
【简答题】简述市场调研与市场预测的关系。
【简答题】A man once said how useless it was to put advertisements in the newspapers. “Last week,” said he, “my umbrella was stolen from a London church. As it was a present, I spent twice its worth in advertis...
【简答题】A man once said how useless it was to put advertisements in the newspapers. 'Last week,' said he, 'my umbrella was stolen from a London church. As it was a present, 1 spent twice its worth in advertis...
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