统一使用：即查即用的数据集能力
Prototype pollution defense: One test patches Object.prototype.then to intercept promise resolutions, then verifies that pipeTo() and tee() operations don't leak internal values through the prototype chain. This tests a security property that only exists because the spec's promise-heavy internals create an attack surface.，这一点在夫子中也有详细论述
，详情可参考谷歌浏览器【最新下载地址】
host, or in a hybrid mode in which they performed some transactions locally and，详情可参考heLLoword翻译官方下载
// 1. 将当日价格存入数组，记录当前索引（i是当前价格在arr中的位置）