问题
填空题
两圆的半径分别为3和5,当两圆圆心距d=6时,两圆的位置关系是______.
答案
∵大圆的半径为5,小圆的半径为3,两圆圆心距为6,
∴5-3<6<5+3,
故两圆相交,
故答案为:相交.
两圆的半径分别为3和5,当两圆圆心距d=6时,两圆的位置关系是______.
∵大圆的半径为5,小圆的半径为3,两圆圆心距为6,
∴5-3<6<5+3,
故两圆相交,
故答案为:相交.
Passage One
What is the main idea of the passage
A.The delicacy of the Chinese restaurant in Singapore.
B.The advantages and disadvantages of living in a cosmopolitan city.
C.The danger and threat of population explosion in urban areas.
D.The high living standard of Singapore, London, Paris and New York.