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问题 选择题
下列事实可用勒夏特列原理解释的是（   ）

A．使用催化剂有利于加快合成氨反应的反应速率

B．硫酸工业中，将黄铁矿粉碎后加入沸腾炉中

C．500℃左右比在室温时更有利于提高合成氨的转化率

D．配制氯化铁溶液时，将氯化铁加入盐酸中，然后加水稀释

答案

答案：D

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单项选择题

Which of the following statements is least accurate with respect to the advantages of open-end exchange traded funds (ETFs) Open-ended ETFs:（）

A. provide for more immediate reinvestment of dividends than do index mutual funds.

B. provide a more cost-effective way for large institutions to invest in emerging markets.

C. provide lower exposure to capital gains distribution taxes than do traditional mutual funds.
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