水平防潮层设置在地层的砼垫层厚度范围内，通常在-0.06m标高处设置。（）

The police locked their suspicion on Vlado Taneski when they found thatA．his reports covered the confidential information.B．the three murder cases all involved elderly women.C．all the victims had some similarities with his late mother.D．he was responsible for the disappearance of a women. 点击查看答案

下列哪一个理论不能解释产业内贸易现象？（）

A．重叠需求理论
B．规模经济理论
C．垄断竞争理论
D．要素比例理论

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