造成重要油料作物油菜“花而不实”的原因是缺乏[]A．缺锌B．缺硼C．缺磷D．缺氮-七年级生物

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• Across the Yangtze River _____ more than one bridge, the Nanjing Changjiang Bridge being the first o
• So _______that in spite of the rare disease, he managed to live as rich and full a life as we do.A．o
• ---He didn’t feel a bit nervous when _____.---No. He’d had a lot of time _____ for it after all.A．in
• Only if he gets a job ______ have enough money to build his own house.A．he canB．can heC．he willD．did
• 为防止小麦在生长期茎杆过弱、容易倒伏，应适时施加[]A．含硼的无机盐B．含钾的无机盐C．含氮的无机盐D．含铁的无机盐-七年级生物
• — What’s the matter with Della? — Well, her parents wouldn’t allow her to go to the party, but she
• — I think it was his excitement for his success in the first half that led to his eventual failure i
• ______ the teacher has given permission, ______allowed to use the equipment in the lab.A．Only if, ar
• Not only _______interested in Beijing Opera but ______beginning to show an interest in it.A．the fat
• There are some seemingly insignificant matters that, when _______ in time, can become bigger ones la
• He is only too ready to help others, seldom, ______, refusing them when they turn to him.A．if never
• We students should treasure the short senior school’s study life of three years. Once ________, the
• Never before _____in greater need of modern public transport than it is today.A．is the cityB．was th
• -----How are things getting on with your work? -----Oh, I’m sorry. Things aren’t going so well as _
• The child tiptoed quietly to the bird. ________ into the forest when he was about to catch it. A．Fle
• I got into trouble again. Only then ________ that I should have followed my parents’ advice.A．I real
• Only after a baby seal is pushed into the sea by its mother _______to swim.A． how will it learnB．wil
• Those who are not admitted to university, ________, may attend some other courses or classes for ad
• So absorbed in his work ____________that not a sound ___________. A．was the president; did she dare
• 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-七年级生物
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• –What made you so sad?--____________ my cellphone.A．LoseB．LosingC．To loseD．Lost-高二英语
• At the foot of the mountain, __________ .A．a village lieB．lies a villageC．does a village lieD．lying
• Not until he failed in the last examination _________ he should have spent more time on study.A．did
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• On no account ________ to our plan for the picnic.A．she will agreeB．agree she willC．will she agreeD．
• 俗话说“庄稼一枝花，全靠肥当家”。植物生长过程中需要量最多的无机盐分别是含______、_______、_______的无机盐。-七年级生物
• On the top of the mountain ______, dating from the 14th century.A．does an old temple stand B．stand a
• ________ a mobile phone can you ring ______ you want to talk with anyway.A．Using; whoeverB．Only on;
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• Little ______ about his own safety, though he was in great danger himself.A．cared heB．he caredC．did
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• 如图，在甲乙两试管中分别放入等量的液体，甲试管中的液体为清水，乙试管中的液体为浓盐水。取两根大小相似的新鲜香菜，洗净，分别插入甲、乙两支试管中。在两试管的管口处用-七年级生物
• On top of the hill ______, whose style can be traced to the ages of the Roman Empire. A．there standi
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