2. 外语
  3. Let P and Q be points which are two inches apart, and let A be the area, in square inches, of a circle which passes through P an

Let P and Q be points which are two inches apart, and let A be the area, in square inches, of a circle which passes through P an

admin2012-01-15  102
问题 Let P and Q be points which are two inches apart, and let A be the area, in square inches, of a circle which passes through P and Q. Which of the following is the set of all possible values for A?
选项 A、0＜A
B、0＜A ≤π
C、A=π
D、A＞π
E、A ≥π
答案E
解析
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