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问题 单项选择题

“牛也力大无穷，俯首孺子而不逞强，终身劳瘁事农，而安不居功，性情温驯，时亦强犟，稳步向前，足不踏空，皮毛骨肉，无不有用，形容无华，气宇轩宏。吾素崇其性，爱其形，故屡屡不厌写之。”是指（）。

A、社会美的社会效益

B、自然美的象征意义

C、形式美的美的形式

D、艺术美的艺术性

答案

参考答案：B

多选题

如图所示，薄壁细圆管竖直放置，圆半径比细管的内径大得多．一小球在管内做圆周运动．已知圆管的半径为0.4m，若小球通过圆管最高点时速度为v，g取10m/s2，则以下说法正确的是（　　）

A．当v=1m/s，小球对管壁有向上的压力

B．当v=1m/s，小球对管壁有向下的压力

C．当v=3m/s，小球对管壁有向上的压力

D．当v=3m/s，小球对管壁有向下的压力
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单项选择题

An analyst does research about capital asset pricing model and gathers the following information about a developing country in which the company is located:

Developing country's equity risk premium 3%
Company's equity beta 0.6
Company's market yield of long-term debt 6%
With respect to the capital asset pricing model, if the market risk premium in the investor's developed country is 10% and the risk-free rate is 3.5%, the cost of equity for this company is closest to:（）

A. 9.2%

B. 11.3%

C. 16.0%
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