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【判断题】
在Cprintf函数和scanf函数是输出和输入函数A.
正确
B.
错误
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举一反三
【单选题】（2011?温州）已知线段AB=7cm，现以点A为圆心，2cm为半径画⊙A；再以点B为圆心，3cm为半径画⊙B，则⊙A和⊙B的位置关系（ ）
A.
内含
B.
相交
C.
外切
D.
外离
【单选题】How many people were killed in the fire?
A.
More than 220 people.
B.
About 50 people.
C.
More than 300 people.
【单选题】How many people were injured or killed in the blasts?
A.
Nobody were killed, four injured.
B.
Two were killed, five injured.
C.
Two were killed, seven injured.
D.
Nobody were killed, seven injured.
【单选题】已知线段AB=7 cm．现以点A为圆心，2 cm为半径画OA；再以点B为圆心，3 cm为半径画⊙B，则⊙A和⊙B的位置关系是 [ ]
A.
内含
B.
相交
C.
外切
D.
外离
【简答题】已知⊙O 1 的半径为3cm，⊙O 2 的半径为4cm，两圆的圆心距O 1 O 2 为7cm，则⊙O 1 与⊙O 2 的位置关系是（ ）。
【单选题】已知线段AB=7cm，现以点A为圆心，2cm为半径画⊙A；再以点B为圆心，3cm为半径画⊙B，则⊙A和⊙B的位置关系（ ）
A.
内含
B.
相交
C.
外切
D.
外离
【单选题】How many people were killed in the fire?
A.
More than 220 people.
B.
About 50 people.
C.
More than 300 peopl
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