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双重for循环打印99乘法表

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shell实现数字的倒序输出。

看听两人的对话，判断他们来自何方，并将图片与人物匹配。Boy: Good afternoon. My name is Jack! What’s your name?Girl: Nice to meet you, Jack. My English name is AliceBoy: I am fromChina. Where are you from?Girl: I am fromUSA.

看两人的介绍，判断他们的姓氏，并将其与人物连线。Boy: May I have your name?Girl: My name is Sara. Sara Smith. What’s your name?Boy: My name is Dick Brown. Call me Dick, please.Girl: Nice to meet you, Dick.

()为曲线凹弧和凸弧的分界点。