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现欲配制200g 1.4% KNO3花卉植物营养液．需KNO3固体 g，需水 mL．（水的密度为1.0g/cm3）
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无土栽培是现代农业的一项新技术其营养液是多种化合物的混合溶液含有植物生长所需的营养元素某种植物进行无
KCl、(NH
4
)
2
SO
4
、NaOH
NH
4
Cl、K
2
SO
4
KNO
3
、H
2
SO
4
K
2
CO
3
、CaCl
2
无土栽培是一种在营养液中培育植物的农业高新技术有良好的发展前景某课外实验小组要配制150g溶质质量分
在种植植物过程中引起营养液酸碱度变化的原因有
营养液中生理酸性盐和生理碱性盐的用量和比例不同
每株植物所占有营养液体积的大小不同
营养液的更换频率
配制营养液的水质
作物的无土栽培可以显著提高产品的产量和质量某茄子的无土栽培营养液中含有7%的KNO3请回答下列问题1
无土栽培花卉蔬菜时在确定营养液的各种无机盐的数量以后依据根细胞吸水的原理配制营养液的浓度请根据下列不
蕨类植物0.001g／ml
马蹄莲0.002g／ml
天竺葵0.0025g／ml
菊花0.003g／ml
欲配制100kg溶质质量分数为7.1％的KN03溶液作无土栽培的营养液需KN03的质量为
7.1kg
14.2kg
71kg
96.9kg
水是一种很好的溶剂在生产生活中有很重要的用途.1如图的净水装置中活性炭的作用是.2欲配制200kg溶
无土栽培是一种在营养液中培育植物的农业高新技术有良好的发展前景某课外实验小组要配制150g溶质的质量
你会用无土栽培花卉吗有一种无土栽培花卉的营养液的溶质质量分数为1.6%它的成分有磷酸铵硝酸钾硫酸铵
08福建晋江6分作物的无土栽培可以显著提高产品的产量和质量某茄子的无土栽培营养液中含有7.08%的K
无土栽培是一种在营养液中培育植物的农业高新技术因为硝酸钾属于肥料所以常用于配制营养液小强要用5%的K
某同学做无土栽培实验时配制营养液的主要试剂之一是质量分数为1.4%的KNO3的溶液现欲配制这种KNO
水者万物之本.1水的组成电解水实验装置如图1所示可用检验与正极相连的玻璃管内产生的气体写出电解水的化
无土栽培是现代农业的一项新技术其营养液是多种化合物的混合溶液含有植物生长所需的营养元素某种植物进行无
KCl、(NH
4
)
2
SO
4
、NaOH
NH
4
Cl、K
2
SO
4
KNO
3
、H
2
SO
4
K
2
CO
3
、CaCl
2
无土栽培是一种农业高新技术它可以显著提高农作物的产量和质量某品种茄子的无土栽培营养液中含有6%的KN
配制一定量某植物营养液已知该营养液中需要钾元素78g氮元素70g则需要KNO3和NH4NO3的质量分
101g和400g
202 g和200 g
202 g和400 g
202g和120g
无土栽培是一种农业高新技术它可以显著提高农作物的产量和质量.1某品种茄子的无土栽培营养液中含有6%的
无土栽培的某种营养液中含硝酸钾化学式为KNO3的质量分数为7.1%.1某蔬菜生产基地欲配制该营养液4
无土栽培技术可以显著提高农作物的产量和质量某品种茄子的无土栽培营养液中含有6%的KNO3.1KNO3
作物的无土栽培可以显著提高产品的产量和质量某茄子的无土栽培营养液中含有7％的KNO31KNO3属于选
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1分Muirsucceedsotherdesignershavefailed﹣﹣﹣﹣herclothesareoriginalyetstylish. A.that B.what C.which D.where
如图所示在纪念中国抗日战争暨世界反法西斯战争胜利70周年大阅兵中我国展示了国产05式高速两栖突击车它是当今世界上水上速度最快的中型两栖突击车．该两栖突击车的总质量为2.9×104kg发动机的功率为106W每条履带与地面接触面积为2m2海上最大行驶速度为40km/h．求 1突击车静止在水面上时受到的浮力多大 2突击车停在水平地面上对地面的压强多大 3突击车在海上以最大速度行驶0.8km发动机做功多少
6分Goodbookstakereadersonjourneysintheirminds.Theannouncementofthisyear'sUSNationalBookAwardsfinalistshashighlightedanumberofmodernliterarygems. Ifyouwanttoknowmoreaboutthesebooksclickhereformoreinformation. 1WhatisthetopicofthebookBetweentheWorldandMe? A.LifeinNewYork. B.RacismintheUS. C.Emotionsoftheoctopus. D.Influenceoftechnology. 2Ifyouwanttoreadabookaboutanimalswhichonewillyouchoose? A.ALittleLife B.BetweentheWorldandMe C.TheSoulofanOctopus D.FortuneSmiles 3Whosebookisacollectionofstories? A.HanyaYanagihara. B.Ta﹣NehisiCoates. C.SyMontgomery. D.AdamJohnson.
如图所示当你手握饮料罐时手与罐都在空中静止且罐底所在平面是水平的下列选项中哪两对力属于平衡力
25分你校英语报请你对本校中学生双休日活动情况做一份调查请结合表格内容用英语写一篇100词的左右调查分析报告并就中学生应如何过双休日发表一下你的看法. 注意1.词数100词左右 2.不要列出具体的数据根据数据分析并得出结果 3.开头语已为你写好. Accordingtotheresultofoursurveyonhowthestudentsinourschoolspendtheirweekendwecanreadthedataasfollows.
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