题目内容

It only takes a fraction of a second for the computer to do the____which used to take days.

A. conclusion
B. experiment
C. explanation
D. calculation

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多数投票原则不一定能体现全体社会成员的偏好。()

The price of been_____from 50 cents to $4 per liter during the summer season.

A. flowed
B. ranged
C. separated
D. differed

当需求缺乏弹性时,如果降低价格,则收益上升。()

_____

A. explosion
B. decision
C. occasionly
D. procession

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