单项选择题

If the circumference of the circle above is 16π, and if the length of AC equals the length of BD, what is the length of AC（）

A.
B.16
C.
D. 32
E. 16π

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单项选择题

In a crate of fruit that contained strawberries, blueberries, and raspberries, the ratio of the number of pints of strawberries to the number of pints of blueberries to the number of pints of raspberries was 6 to 4 to 5, respectively. If the crate contained a total of 45 pints of these fruits, how many more pints of strawberries than blueberries were there in the crate（）

A. 2
B. 3
C. 4
D. 5
E. 6

单项选择题

If x+y=16, and if x2-y2=48, then x-y=（）

A. 3
B. 4
C. 6
D. 32
E. 36

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