单项选择题

A rectangular rug covers half of a rectangular floor that is 9 feet wide and 12feet long．If the dimensions of the rug are in the same ratio as those of the floor，how many feet long is the rug（）

A.A
B.B
C.C
D.D
E.E

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单项选择题

There are six marked points on the circle above． How many different lines can be drawn that contain two of the marked points（）

A. 5
B. 6
C. 12
D. 15
E. 30

单项选择题

The rectangular box shown above has been wrapped with two tapes，each going once around the box without overlap and running parallel to the edges of the box．How many centimeters of tape were used on the box（）

A. 70
B. 80
C. 120
D. 140
E. 150

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