描述：给定字符串 num（非负整数）和整数 k，移除 k 位数字，使剩余数字最小。以字符串形式返回（不含前导零）。
Kosmos 482 is now being closely tracked by international space agencies.
。51吃瓜对此有专业解读
Последние новости
（三）自境外单位或者个人购进服务、无形资产或者境内不动产取得的完税凭证上列明的增值税税额；
caution, as they may not always be accurate or appropriate.