在盐碱地里栽种的植物不容易成活的原因是[]A．土壤水分太多B．土壤温度太高C．土壤溶液浓度太高D．土壤空气太少-七年级生物

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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-八年级生物
• 植物需要量最大的无机盐是[]A．氮、磷、钾B．钾、钙、镁C．铁、硼、钾D．钠、钾、铁-七年级生物
• 植物需要量最大的是含氮、磷、钾的三种无机盐，其他的一些无机盐，植物对它们的需要量非常小，因此，有没有都无所谓。[]-七年级生物
• Many provinces have been hit with smog. If _______ unsolved, the problem may lead to more serious re
• _______, and problem will be settled.A．A bit more effortB．making a little more effortC．If you make a
• ______in health,he insisted on doing the experiment.A．As he was poorB．Poor as he wasC．Poor was heD．P
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• (2013·新课标Ⅱ，12)Only by increasing the number of doctors by 50 percent________properly in this hospita
• ---Would you please help me get this job with the company?---Sure. You know, I would do ______ for y
• ---- Have you got any particular plans for the coming holiday? ---- Yes, ______ . I am going to vis
• Directly he arrived the bus station, then ____ he had intended to take. A．a bus did comeB．a bus cam
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• —We are planning to have a casual get-together this Saturday or Sunday. Are you coming?— ________. I
• 在下列作物的生长中，应该注意多施加钾盐的一组植物是[]A．甘薯、马铃薯B．番茄、花生C．白菜、油菜D．菠菜、芹菜-七年级生物
• ---- This store has such high prices.---- I agree. Never again ____ here.A．I will shopB．will I shop
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• Not until all the fish died in the lake __________ how serious the pollution was.A．did the villagers
• 在下列哪种溶液中培养，绿色植物会生长不良[]A．土壤浸出液B．蒸馏水C．无土栽培营养液D．自来水-七年级生物
• If carefully, the experiment will be successful.A．doB．doesC．doneD．doing-高三英语
• While ______ in Scotland, he made friends with the natives there.A．workingB．workedC．he worksD．he is
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• _____ fired, your health care and other benefits will not be immediately cut off. A．Would you beB．Sh
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• 按照下图的方法，取2个大小相同的萝卜，各从顶端向下挖一个大小相同的洞，在A萝卜洞内装上浓盐水，在B萝卜洞内装上清水，过一段时间后，观察萝卜洞内水位的变化并注意用手摸-七年级生物
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• 有人将90千克土壤盛在木桶里，将重23千克的柳树苗种在桶中，只浇灌纯净的水5年后再次称量，发现土壤重量减少0.057千克，柳树重量增加74.5千克。柳树增加的重量主要来自[]A-七年级生物
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