siftDown(arr, i, 0); // 对剩余i个元素重新建堆
swap(&arr[low], &arr[randomIdx]); // 基准换到开头，详情可参考爱思助手下载最新版本
An Mn3Sn homo-junction enables efficient field-free full switching of chiral antiferromagnets with greatly reduced power consumption, advancing their potential for energy-efficient magnetic memory devices with advantages of ultradense integration and ultrafast speed.。业内人士推荐51吃瓜作为进阶阅读
今天的中国海纳百川，国家发展和人民幸福同心同向。把亿万人民的智慧和力量汇聚起来，我们朝前走步履坚实、步伐铿锵。
We meet Collins at London's Science Museum. She's softly spoken, warm and very down to earth - but you quickly get a sense of her focus and determination. She clearly has inner steel.