【单选题】

listEning 6 "BotAnyClAss"
{$mEDiAurl}

whAt is this DisCussion mAinly ABout
A、growing plAnts without soil
B、mixing nutriEnts in wAtEr
C、iDEntiFying ChEmiCAls in soil
D、solving proBlEms in thE wAtEr

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根据网考网移动考试中心的统计，该试题：
81%的考友选择了A选项
3%的考友选择了B选项
15%的考友选择了C选项
1%的考友选择了D选项

listEning 6 "BotAnyClAss"{$mEDiAurl} whAt is this DisCussion mAinly ABoutA、growing plAnts without soilB、mixing nutriEnts in wAtErC、iDEntiFying ChEmiCAls in soilD、solving proBlEms in thE wAtEr