下图是有关生物细胞生活史的概括。请根据图分析回答问题。(1)假设A、B、C代表水生生物发育过程的起始阶段，则A细胞是_______，通过___________才能使细胞数目不断增多。(2)③-七年级生

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• I hope you will find this valley a beautiful place___you.may spend your weekend .[ ]A. that B. which
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• Life is like a long race ________ we compete with others to go beyond ourselves.[ ]A. whyB. whatC. t
• I can still remember the sitting room___mymother and I used to sit in the evening.[ ]A. whatB. which
• 柑橘黄龙病是由严重危害柑橘类果树的黄龙病病毒引起的，这种病可以摧毁整个柑橘园。为了培育出“柑橘脱毒苗”，最有效的方法是进行[]A．嫁接B．种子繁殖C．组织培养D．太空育种-八年级生物
• 下图为嫁接过程示意图，请据图回答下面的问题。(1)结构A的名称是_______，结构B的名称是_________。(2)在嫁接时要用麻绳或塑料绳捆紧扎好，目的是使A与B的___________紧密结-
• — What do you think of teaching, Bob?— I find it fun and challenging. It is a job ________ you are d
• I'll give you my friend's home address______ I can be reached most evenings.[ ]A. whichB.
• Faye's fondest memory is of last year, ____ the club gave a tea party for her birthday.[ ]A. th
• 蜜桔常用的繁殖方法是[]A．嫁接B．压条C．切根D．扦插-八年级生物
• 下图表示无性生殖的几种方式，根据图示写出每种生殖方式的名称。A．_________B．________C．__________-八年级生物
• Mozart's birthplace and the house ________ he composed "The Magic Flute" are both mus
• The knee is the joint ____ the thigh bone meets the 1arge bone of the lower leg.[ ]A. whenB. whereC.
• 依靠植物的根茎叶进行的无性生殖是一种[]A．出芽生殖B．营养生殖C．植物的组织培养D．种子生殖-八年级生物
• 下列生殖方式不属于无性生殖的是[]A．种子繁殖B．孢子生殖C．出芽生殖D．分裂生殖-八年级生物
• 水螅在条件适宜的环境下的生殖方式是[]A．孢子生殖B．出芽生殖C．分裂生殖D．营养生殖-八年级生物
• 酵母菌、蓝藻、秋海棠、根霉四种生物共有的生殖方式是[]A．孢子生殖B．出芽生殖C．分裂生殖D．无性生殖-八年级生物
• —Is that the small town you often refer to?—Right, just the one ____you know I used to work for year
• I have reached a point in my life ________ I am supposed to make decisions of my own.[ ]A. whichB. w
• In Australia, surfing is a popular sport among young people ____ they can seek excitement and advent
• 下列哪一项不是营养生殖的优点[]A．繁殖方式简便B．能保持品种的优良性状C．繁殖速度加快D．能提高后代的成活率-八年级生物
• 竹子是靠其地下茎节上的芽形成的竹笋长成新个体的，这种繁殖是无性繁殖。[]-八年级生物
• 下列植物的繁殖方式与获得克隆羊多利的方式具有本质区别的是[]A．将马铃薯的块茎切成小块后种植B．将月季的枝条插入土壤后生根成活C．遗落在土壤中的花生种子发育成幼苗D．秋海棠-八年级生物
• 用出芽的马铃薯块茎进行繁殖属于[]A．营养生殖B．出芽生殖C．孢子生殖D．有性生殖-八年级生物
• He's got himself into a dangerous situation ___he is likely to lose control over the plane.[ ]A
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• — Is that the small town you often talked about? — Right, just the one________ you know I used to wo
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• 下列诗句中的描述与生物生殖现象无关的是[]A．离离原上草，一岁一枯荣B．春种一粒粟，秋收万颗子C．忽如一夜春风来，千树万树梨花开D．红豆生南国，春来发几枝-八年级生物
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• It is now a children's festival, ______ they can dress up and go to their neighbours' home
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• I was so occupied last year that I could hardly find any occasion _____ I stayed with my kids around
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