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问题 填空题

电空制动用电磁阀的额定工作电压为直流（）。

答案

参考答案：110V

选择题

下列实验的实验现象与实验结论都正确的是

 实验操作实验现象实验结论
A将一根未打磨的铝条放入

硫酸铜溶液中

无紫红色固体析出铝不如铜活泼
B将带火星的木条伸入空气瓶中木条不复燃空气中氧气不能支持燃烧
C向鸡蛋清中加入饱和硫酸铵溶液出现白色沉淀发生的变化是物理变化
D将氢氧化钠固体加入水中溶液温度升高该反应放热
 
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单项选择题

Catherine, a CFA charter holder and an analyst for D＆G Investment Limited, is preparing a buy recommendation on the Toys Limited. According to AIMR Standards of Professional Conduct, which of the following is NOT a conflict of interest that he would normally disclose（）

A. Catherine’s son has a trust fund that holds a substantial block of Toys Limited stock.

B. Catherine has a consulting contract with the Toys Limited.

C. Catherine’s next-door neighbor works at Toys Limited.
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