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Israel claimed its first athletics medal of the meet as Jonathan Kapitolnik won men's high jump with a 2.27m clearance.

BOCHUM, Germany, July 24 (Xinhua) -- Long jumper Shu Heng leaped 8.09 meters to claim China's first track and field gold medal, while South Africa's teenage sprinting sensation Bayanda Walaza won his ...

什么是 ？（问号）操作符？ 在TypeScript里面，有3 4个地方会出现问号操作符，他们分别是 三元运算符 // 当 isNumber (input) 为 True 是返回 ? : 之间的部分； isNumber (input) 为 False 时 // 返回 : ; 之间的部分 const a = isNumber (input) ? input : String (input); 参数 / ...