单项选择题


The rectangular solid above is made up of eight cubes of the same size，each of which has exactly one face painted blue． What is the greatest fraction of the total surface area of the solid that could be blue（）
 

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

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单项选择题
If corresponding sides of △ABC and△A’B’C’ above are proportional, what is y in terms of x（）

A.A
B.B
C.C
D.D
E.E
单项选择题
In square PQRS above．T is the midpoint of side RS．If PT=，What is the length of a side of the square（）

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