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单项选择题

In how many of the years shown was the number of widgets sold at least three times the number of widgets sold in 1960

A． Four
B． Three
C． Two
D． One
E． None

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单项选择题A

单项选择题It can be inferred from the passage that which of the following is true of bears

A． They are particularly resourceful.
B． They must enter human habitats in order to survive.
C． They cannot tolerate human food.
D． They eat voraciously throughout the winter.
E． They have only one method of obtaining food.