17.用含18o的h2o作原料让一株植物进行光合作用一段时间后在这株植物通过�吸作用产生的co2和h2o中含有18o的是 A Template




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tomski17.用含18o的h2o作原料让一株植物进行光合作用一段时间后在这株植物通过�吸作用产生的co2和h2o中含有18o的是 a coloring