设完全市场中的代表性厂商的短期成本函数是STC=20+240Q-20Q²+Q³，若该产品的市场价格是315元，试问：

（1）该厂商利润最大时的产量和利润

（2）该厂商的不变成本和可变成本曲线

（3）该厂商停止营业点

（4）该厂商的短期供给曲线

下列属于广义工资的有(    )。

实际国内生产总值：（    ）

随着消费商品数量的增加（     ）

中国共产党为什么能，中国特色社会主义为什么好，归根到底是马克思主义行，是中国化时代化的马克思主义行。

1927年4月12日，蒋介石在（   ）发动了“四•一二”反革命政变，

财政政策挤出效应存在的最重要原因就是政府支出增加引起（ ）

Li Qiang has been in Beijing for a few days. He wants to visit the China Railway Museum. He asks his friend Ma Kai for help.

Li Qiang: Hi, Ma Kai. Do you know the China Railway Museum? I heard that many people all over the world visit it every day.

Ma Kai: Yeah. It is the    1    professional museum about the railway system in China.

Li Qiang: Oh, really? It must be    2    .

Ma Kai: Yes, you'll be able to see a large number of    3    objects,    4    ,photos,    5    and multi-media, etc. All these will give you a detailed    6    to the development of the Chinese railway system in the past century.

Li Qiang: Where is the Museum    7    ?

Ma Kai: It is located in Chaoyang District, about 15 kilometers    8    of downtown Beijing.

Li Qiang: Is it    9    for you to take my brother and me there? I'd like someone    10    with the museum to go with us.

Ma Kai: Sure, I'd be very glad to be your tour guide.

货币供给:（    ）

如何确认无效劳动合同?