下列哪项不是细胞学说的主要内容[]A．一切动植物由细胞及其产物构成B．细胞是生物体相对独立的单位C．细胞可以产生细胞D．细胞分为细胞质、细胞核和细胞膜三大部分-高一生物

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• 19世纪30年代创立的细胞学说的最主要的意义是[]A．证明病毒不具有细胞结构B．使人们对生物体的结构认识进入微观领域C．证明生物之间存在亲缘关系D．发现动植物细胞的不同之处-高一生物
• 最先观察和记载植物细胞结构的学者是[]A．英国植物学家布朗B．英国自然科学家虎克C．荷兰生物学家列文·虎克D．德国植物学家施莱登-高一生物
• If city noises_____from increasing, people _____shout to be heard even at dinner.[ ]A. are not kept;
• The other day we traveled fifteen hours to a magic country. which America,and we enjoyed ourselvesth
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• 可作为对一种单细胞生物进行分类的依据是[]A．核膜的有无B．核糖体的有无C．细胞壁的有无D．膜上载体蛋白的有无-高一生物
• — How was the journey? — Tiring! I caught the train at the last second but all the seats _____. I st
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• Experiments of this kind ________ in both the U. S. and Europe well before the Second World War.[ ]A
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• —Will Mr. Green be able to see me at 10:00 ?—Sorry, but hefully until 3:30 unless there's a can
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• John had to have his car repaired in a garage because it _____seriously.[ ]A. damaged B. was being d
• The policeman's attention was suddenly caught by a small box which ______ placed under the Mini
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• 科学家通过对动植物细胞的研究，提出了细胞学说，下列叙述错误的是[]A．细胞是一个相对独立的单位B．多细胞生物体内的单个细胞对整体的生命不起作用C．老细胞通过细胞分裂产生新-高一生物
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• A series of stimulus policies and supportive measures taken by the government ________ to promote ch
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