Can you use a straight line turn these three ten into "nine fifty"?10 10 10

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• there are 10 points on a plane ,and any arbitrary three points are not in a straight line.segments or not,linking any two points .In order to make sure that any point in these ten points can arrive at any other points by the linking line segments,how many line segments between two points should be linked at least?不是翻译，是做题，不用英语回答。
• Can you use a straight line turn these three ten into "nine fifty"?10 10 10
• Using only one straight line,can you turn this into nine fifty?10 10 10
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