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问题 单项选择题

某管网中A点所在地面高程为32m，水压标高为60m。则该点的服务水头为( )。

A．28m
B．32m
C．60m
D．92m

答案

参考答案：A

解析：服务水头为节点水压与地面高程之差，即A点服务水头为60-32=28m。

问答题

The price of crude oil hit an all-time high early in April. The surge in oil price harms virtually all consumers and industries.
Nevertheless, according to Wharton finance professor Jeremy Siege, record high prices are not as bad as they look. "The major reason for that is we have become much more energy efficient."

Topic: The rising price of oil


Questions for Reference:
1. What are the advantages and disadvantages of the rising price of oil on the economic development
2. Why does the price of oil fluctuate What can we do to reduce the negative effects to the least
3. What does Prof. Siege mean when he says we are more energy efficient

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单项选择题

在农贸市场，一位顾客想买1斤草莓，销售者说：“10元3斤，只买1斤不卖！这位销售者的行为违背了市场交易原则中的（）

A.诚实信用

B.自愿原则

C.平等原则

D.公平原则
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