func (*Option) Arg ¶
第四十八条 承运人在船舶开航前和开航当时，应当谨慎处理，使船舶处于适航状态，妥善配备船员、装备船舶和配备供应品，并使货舱、船舶其他载货处所以及承运人提供的载货集装箱适于并能安全收受、载运和保管货物。
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Call Screening supports Cantonese (China mainland, Hong Kong, Macao), English (U.S., Australia, Canada, India, Ireland, New Zealand, Puerto Rico, Singapore, South Africa, UK), French (Canada, France), German (Germany), Japanese (Japan), Korean (Korea), Mandarin Chinese (China mainland, Taiwan, Macao), Portuguese (Brazil), and Spanish (U.S., Mexico, Puerto Rico, Spain). Hold Assist supports English (U.S., Australia, Canada, India, Singapore, UK), French (France), Spanish (U.S., Mexico, Spain), German (Germany), Portuguese (Brazil), Japanese (Japan), and Mandarin Chinese (China mainland).
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）。