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• 水稻生长的后期，为防止灌溉后倒伏，应多施（）A．含钾的无机盐B．含磷的无机盐C．含氮的无机盐D．含锌的无机盐-生物
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• 如图是植物根尖结构图，据图回答：（1）图中各部分依次是一二三四。（2）吸收水分和无机盐的主要部位是。（3）根吸收来的水分和无机盐，通过茎中运输到叶。（4）当周围水溶液的浓度小-七年级生物
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• The research is so designed that once _____ nothing can be done to change it.A．beginsB．having begunC
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• 为了防止水稻倒状（成熟期植株自然倒下），在水稻生长早期应追加什么肥最有效[]A．含氮的肥料B．含磷的肥料C．含钾的肥料D．混合肥料-七年级生物
• “In no conditionyou are a Chinese.” Dad told me before I went abroad.A．you should forgetB．forget you
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• 海尔蒙特从柳树栽培实验中得到启发，绿色植物生长所需要的物质是[]A．二氧化碳B．水C．氧气D．无机盐-七年级生物
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• —Why wasn't John hired for the job?—I don't know, but he ________.A．wasB．had beenC．should
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• 在植物的生长过程中，需要大量的无机盐是（）A．含铁、锌、钙的B．含锰、铁、氮的C．含氮、磷、钙的D．含氮、磷、钾的-生物
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