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⣺֪ʶ  ԴӰ̸  ʱ䣺2019-12-30 19:32:15

ʳƷзḻӪʣܱʵʳƷӪܵƻһкʺͶأʳжʳܱ︯ʵԭ¼㣺

ʳʵ

1΢ķֳ΢Ʒַ࣬Ӵ󣬹㷺شȻСЩ͹ũҵȱ٣ģЩΣʳƷ΢ȾһЩкʺͶأȻʳƷĸй״Ըı䣬Ķأײж𰩱䡣

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2øáøһɳɷ֣һĵʣ߻á㡢ݵɱ֯еøзֽøãԭֽΪᣬʹ(ph)½ӣøʹʼֽȥͿɸܱʡʳ߲ˡˮժԽкˮͶ̼ø£Ҳɸܱʡ

3ˮֵӰ졣һ庬85%ˮ֣΢ֳҪӪʣҲϸϸԭʵҪɷ֣ʳƷˮһ50%ϣϸֳˮ3%£Ϳʼˮ12%£ϸԷֳʪȴﵽ80%ʱʳƷ溬ˮӣɼʳƷù䡣

4¶ȵı仯һϸ37¶ٸߣ?ɳϾ20ֳܴ?0—80ͻ²ɱϸ

΢Ҫ̶Ȳͬĸùֳܷⶾ˾ģڹͷ׷ֳ󳦸˾¾ֳܷ

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