下列蔬菜中需要含氮无机盐较多的是（）A．花生B．白菜C．番茄D．马铃薯-生物

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• 枝条是由芽发育成的，植株生长需要量最多的无机盐是氮、磷、______．-生物
• 无土栽培是栽培植物的新技术，青菜在无土栽培的培养液中也能茁壮成长．下列有关叙述中，不正确的是（）A．培养液的浓度大小不会影响青菜对水的吸收B．配制的培养液的主要成分与土-生物
• 小刚栽种了一棵菠菜，过了一段时间发现植株矮小，新叶淡绿，老叶黄色枯焦，这最可能是缺少了[]A．含氮的无机盐B．含磷的无机盐C．含钾的无机盐D．含铁的无机盐-八年级生物
• 油菜“花而不实”是由于缺乏哪种无机盐[]A．缺氮B．缺磷C．缺钙D．缺硼-七年级生物
• 农民一次施肥过多，造成“烧苗”，产生这种现象的原因是[]A．土壤溶液浓度小，细胞吸水B．土壤溶液浓度大，细胞失水C．气温过高损害植物D．水分运输不畅通-七年级生物
• “庄稼一枝花，全靠肥当家”。下列对这句农谚的理解中不正确的是[]A．只要有了“肥”，庄稼就能生长发育好B．“肥”是指植物所必需的含氮、磷、钾等元素的无机盐C．这句农谚强调了“肥-七年级生物
• 农业生产上只有根据种植植物的目的来确定各种无机盐的施用量才能获得高产。[]-七年级生物
• X、Y、Z是三个相邻的植物细胞，已知Z细胞液浓度＞Y细胞液浓度＞X细胞液浓度。下列各图中能正确表示三者吸失水关系的是（注：箭头表示水的流向）[]A．B．C．D．-七年级生物
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