发布时间:2025-01-24 21:14:24
九十的近似数是100。
解题:
根据四舍五入的规则,一个数精确到百位看十位上的数,十位是9大于4,要进位,那么这个数等于100。
中央空调的辅材包括铜管冷凝水管铜管和冷凝水管的保温套引风管冷媒剂等分别是哪些牌子好
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