记忆技巧：找「更大」→ 弹掉 ≤ 当前的（栈顶保留比当前大的）；找「更小」→ 弹掉 ≥ 当前的；找「相等可接受」→ 用 < / ，否则用 <= / =。
At least one American citizen was shot dead and another injured by Cuban officials intercepting a speedboat off its coast on Wednesday, a US official has said.
，详情可参考下载安装 谷歌浏览器 开启极速安全的 上网之旅。
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Медведев вышел в финал турнира в Дубае17:59