单项选择题



Three carpet pieces in the shapes of a square, a triangle, and a semicircle are attached to one another, as shown in the figure above, to cover the floor of a room. If the area of the square is 144 feet and the perimeter of the triangle is 28 feet, what is the perimeter of the room’s floor, in feet （）

A. 32+12π
B. 40+6π
C. 34+12π
D. 52+6π
E. 52+12π

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单项选择题
At the time during year X when the difference between the price of ABC common stock and the price of XYZ common stock was at its greatest, the price of XYZ common stock was approximately what percent of the price of XYZ common stock and ABC common stock combined （）

A.16%
B.30%
C.36%
D.42%
E.103%
单项选择题
All three circles shown have radius 1 and are tangent to each other. Find the perimeter of the shaded region.（）

A. 3
B. π
C.
D. 2π
E. 3π
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