题目

判断下列句子与图片内容是否相符,相符的用字母“Y”表示, 不相符的用字母“N”表示。 (______)1. There is a river in front of the house. (______)2. The girl can sing very well. (______)3. I can do some kung fu. (______)4. There is a clock in my room. 答案:【答案】NYNY【解析】略两圆的半径分别为3和5,若两圆的公共点不超过1个,圆心距d的取值范围是    .
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