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"2千米等于多少分钟"...2千米等于多少分钟
"二千米等于多少米"...二千米等于多少米
"二千米等于多少分米?"...二千米等于多少分米?
"2千米等于几分米"...2千米等于几分米
"2千米等于多少毫米"...2千米等于多少毫米
"2千米=多少米?"...2千米=多少米?
"2千米等于多少千米"...2千米等于多少千米
"二千米等于几厘米?"...二千米等于几厘米?