单项选择题

案例分析题

For which country was the ratio of its savings rate to its real GNP growth rate greatest （）

A.Japan
B.Canada
C.Australia
D.Italy
E.Switzerland

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单项选择题

Josh works on the second floor of a building. There are 10 doors to the building and 8 staircases from the first to the second floor. Josh decided that each day he would enter by one door and leave by a different one, and go up one staircase and down another. How many days could Josh do this before he had to repeat a path he had previously taken（）

A.80
B.640
C.800
D.5040
E.6400

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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