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【简答题】
某地上年度电价为0．8元，年用电量为1亿千瓦时．本年度计划将电价调至0．55元～0．75元之间，经测算，若电价调至 元，则本年度新增用电量 (亿千瓦时)与 反比例．又当 时， ． （1）求 与 之间的函数关系式； （2）若每千瓦时电的成本价为0．3元，则电价调至多少时，本年度电力部门的收益将比上年增加20%？[收益 用电量 (实际电价－成本价)]
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举一反三
【单选题】Questions 19 to 22 are based on a conversation between two friends． What‘s the good news for the man? 查看材料
A.
His company wants him to stay in New York for another half year．
B.
His wife is involved in an important project．
C.
His company wants him to move to an apartment．
D.
He could save money in the long run．
【单选题】We will meet you ________ we get to your city.
A.
before
B.
because
C.
as soon as
D.
since
【单选题】Questions 19 to 22 are based on the conversation you have just heard.19.
A.
Full parking facilities.
B.
Leaving his car in the U.K.
C.
Having his car serviced.
D.
Hiring a car abroad.
【简答题】King John thought that the Abbot must own _________ possessions than him.
【单选题】Questions 19 to 22 are based on the conversation you have just heard.
A.
His health is getting worse.
B.
He can no longer work at sea.
C.
His past life upsets him a good deal.
D.
He has not got the expected pension.
【简答题】Questions 19 to 22 are based on the conversation you have just heard. 19. A. He prefers the smaller evening classes. C. He has to work during the day.B ) He has signed up for a day course. D. He finds...
【简答题】Questions 19 to 22 are based on a conversation between two friends. what's the good news for the man? [A] His company wants him to stay in New York for another half year. [B] His wife is involved in a...
【单选题】Whom does the abbot describe as 'well versed in the wiles of the Evil One'?
A.
St. Thomas Aquinas
B.
William of Baskerville
C.
The Inquisitor Bernardo Gui
D.
The (then) anonymous murderer
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