第1个回答 2011-06-10
相交 C1圆心（-1，-1）半径2 C2 圆心（2，-5）半径4 圆心距5 小于半径之和
第2个回答 2011-06-10
先判断圆心，在判断半径，看看圆心之间距离于两个半径和的关系。不会去洗洗睡吧。
第3个回答 2011-06-10
1、The young man _____ to us and then left.
2、Mrs Li ____ work two years ago and now she walks to the office.
3、My pet dog _____ and I was very sad.
4、They _____ two hours in playing football in the morning.
5、These people climbed at a(n) ______ of 1,000 meters.
6、After these workers worked three hours, they _____for one hour.
7、Mr Brown wanted to _____ a new school for those Chinese students.
8、Martin _____ for five hours in the school gym yesterday. he felt very tired.
9、The boys in the photo and Mr Brown's _______ .
10、They will ______ Shanghai at 7:00 tomorrow morning.
2、Mrs Li ____ work two years ago and now she walks to the office.
3、My pet dog _____ and I was very sad.
4、They _____ two hours in playing football in the morning.
5、These people climbed at a(n) ______ of 1,000 meters.
6、After these workers worked three hours, they _____for one hour.
7、Mr Brown wanted to _____ a new school for those Chinese students.
8、Martin _____ for five hours in the school gym yesterday. he felt very tired.
9、The boys in the photo and Mr Brown's _______ .
10、They will ______ Shanghai at 7:00 tomorrow morning.
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