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【单选题】
If the sides of a triangle are 8, 15, and 17 units long, what is the measure of the angle formed by the two shortest sides?A.
30°
B.
45°
C.
60°
D.
75°
E.
90°
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反馈参考答案：
举一反三
【简答题】Why did Jack come there?
【单选题】What's the trend of the work force?
A.
There will be more women than men in the work force.
B.
There will be more men than women in the work force.
C.
There will be as many women as men in the work force.
D.
The work force will remain unchanged.
【多选题】关于定理找圆心的方法有()
A.
圆上的任意一点到圆心的距离都等于圆的半径
B.
两圆外切，中心距等于两圆半径和。
C.
两圆内切，中心距等于两圆半径差
D.
圆与直线相切，圆心到切点的距离等于半径
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