Not until he took off his dark glasses ___________ he was a famous film star. A．had I foundB．did I f

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• 实验1在洁净的玻璃板的两侧，分别滴有少许土壤浸出液和等量的蒸馏水，将玻璃板放在火焰上加热，待土壤浸出液和蒸馏水完全蒸发后，观察发生了什么现象。实验2中用甲、乙两个试-七年级生物
• 下图表示植物细胞吸水和失水示意图，根据图回答：(1)细胞吸水或失水主要取决于____浓度和_____浓度之间的大小。(2)萎蔫的青菜放入清水中变得硬挺，在这一过程中细胞是吸水还是-七年级生物
• For a moment nothing happened; then______ from the excited audience.A．cheers cameB．did cheers comC．c
• So convenient _______ to pay by credit card that more and more people apply for their credit cards.
• 刘芳同学要探究某种植物生长是否需要含氮的无机盐，设计方案如下：请你帮她将探究活动的过程填写完整。(1)提出问题。(2)作出假设。(3)实验步骤：①配制种类齐全的无机盐培养液放-七年级生物
• 为了证明镁是大豆生活必需的无机盐，取两株生长状态相同的大豆幼苗，将其中的一株培养在含镁的培养液中，另一份培养在（）中．A．纯净水B．不含镁的沙土C．只含镁的水D．不含镁的培-生物
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• Mother reminds, “________ rain, take an umbrella.” as spring approaches.A．Shall itB．It shallC．Shoul
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• (2013·郑州一模)—Did you tell her the bad news?—Yes, but I'd rather ________.A．didn't B．notC．no
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• 下列关于无机盐的说法，错误的是（）A．不同植物一生中需要的无机盐不同B．同一植物在不同手杖发育时期对无机盐的需求量不同C．植物生活需要量最大的无机盐是含氮、含磷和含钾的无-生物
• 下列哪些是最能体现现代化生产的农业措施（）A．合理灌溉B．合理施肥C．根外追肥D．无土栽培-生物
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• It’s beyond words. Nowhere else in the world _______ such a wonderful house!A．can find youB．you can
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• 某同学设计了一组实验：在两个大小相似的萝卜中各挖一个相等的洞，向甲、乙萝卜的洞中分别注入等量的清水和浓盐水，放置一段时间，分析会出现的变化。（1）用手捏萝卜的感觉：甲-八年级生物
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• 植物生活中，不同植物对各类无机盐的需要量_______；同一植物的不同生长期，对无机盐的需要量_______。-七年级生物
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• 当小麦出现茎秆软弱、易倒伏的病症时，说明小麦缺少（）A．氮肥B．磷肥C．钾肥D．钙肥-生物
• 农业生产中需要施肥，肥料主要为农作物的生长提供（）A．有机物B．无机盐C．水D．氧气-生物
• 东北黑土地里种植的马铃薯块大、质优、淀粉含量高，说明黑土中含有充足的（）A．含氮无机盐B．含磷无机盐C．含钾无机盐D．含铁无机盐-生物
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