It is the third time that she has won the race, ______ has surprised us all.[ ] A. that B. whereC. w

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• 将一段带叶的枝条插入加有红墨水的水中，几小时后将茎横切，观察切口，发现被染红的是（）A．保卫细胞B．表皮细胞C．木质部细胞D．韧皮部细胞-生物
• 把幼嫩植物的茎掐断，从茎的断面上会渗出汁液，这些汁液主要来自（）A．筛管B．形成层C．导管D．韧皮部-生物
• 植物的茎有运输有机物的功能，其运输功能的完成是通过（）A．导管、方向是自下而上B．筛管、方向是自下而上C．导管、方向是自上而下D．筛管、方向是自上而下-生物
• 植物根尖的各个区段中，能使根尖不断长长的区段是（）A．成熟区B．伸长区C．分生区D．分生区和伸长区-生物
• 根的长度能不断增加的原因是（）A．根冠不断增加新的细胞，分生区也不断增加新细胞B．根冠不断增加新的细胞，伸长区不断伸长C．分生区不断增加新细胞，伸长区不断伸长D．伸长区不断-生物
• 某同学在10岁时按自己身高在5米高的树上刻了离地面1.4米的一个标记，10年后，他的身高为1.8米，这棵树长到20米，那么原来刻的记号，现在离地面的距离是（）A．6.4米B．1.4米-生物
• My cousin, _____the body is slim, still wants to lose some weight. [ ]A. whose B. which C. of whom D
• 关于导管和筛管的描述中，错误的是（）A．茎的木质部中有导管B．茎的韧皮部中有筛管C．筛管能运输有机物D．导管能向下运输水分和无机盐-生物
• 人们利用根系分布的特点在山坡和沙地造林、种草，其目的是（）A．保持水土B．绿化环境C．放牧牲畜D．增加经济效益-生物
• That evening, ___ I will tell you more about later, I ended up working very late. [ ]A. thatB. which
• 岱庙里的千年古树，有的树心已经朽烂，变成空心洞．可是，这样的古树还是照样枝繁叶茂．由此推断，朽烂掉的“树心”主要是古树的（）A．全部韧皮部B．部分韧皮部C．全部木质部D．部分木-生物
• By nine o'clock, all the Olympic torch bearers had reached the top of Mount Qomolangma, _____ap
• After graduating from college, I took some time off to go travelling, _____ turned out to be a wise
• As a child, Jack studied in a village school, _____is named after his grandfather.[ ]A. whichB. wher
• 将植物的一个枝条的树皮剥去一圈后，将会（）A．影响水和无机盐的运输B．影响水、无机盐和有机物的运输C．影响有机物的运输D．不会影响植物的运输作用-生物
• Nowadays teenagers like to go to fast food restaurants, ____ as the name says, eating doesn't t
• It is few people, _____ have come to ask for the position, ____ fit for the job. [ ]A. who; who do I
• Have you ever listened to the song Yesterday once more, _____ singer died in her early years? [ ]A.
• 根吸收的水分是通过______把水送到叶、花等器官的．-生物
• 为提高树的成活率，常给一些刚移栽的树木输液（水和无机盐），你认为针头必须插入到树干的（）A．树皮B．韧皮部C．形成层D．木质部-生物
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• 水分和无机盐在植物茎内的运输途径是（）A．茎的导管B．茎的筛管C．茎的形成层D．茎中的营养组织-生物
• 根不断增加长度的主要原因是（）A．分生区分裂及伸长区细胞的伸长B．分生区及根冠的变化C．伸长区可以不断伸长D．分生区细胞不断增生-生物
• She's in a hopeless situation, ____wewill keep a very close eye on[ ]A. where B. when C. which
• 下列关于植株的生长说法错误的是（）A．根的生长要靠分生区细胞数量增加B．根的生长要靠伸长区细胞数量增加C．植物的生长需要水、无机盐和有机物D．枝条是芽发育成的-生物
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• I was given three books on sewing, the first _____ I really enjoyed. [ ]A. that B. which C. of which
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• 从掐断的幼嫩的植物茎上可看见汁液，它们来自于（）A．导管B．细胞液C．筛管D．水蒸气-生物
• 根尖是由根冠、______、______和______组成．-生物
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• 如图是茎的横切面和纵切面示意图，请据图回答（1）图中①是______，它在______中；②是______，该结构属于______组织；③是______，它在______中；（2）图中④表示_____
• 下列有关植物根的作用中说法错误的是（）A．固着植物体，使茎能够直立B．从土壤中吸收水分和无机盐C．有些根还具有贮藏、繁殖的功能D．是光合作用的主要器官-生物
• 植株根的生长是依靠根尖（）的细胞数量的增多和（）体积的增大．A．根冠伸长区B．分生区成熟区C．分生区伸长区D．成熟区根冠-生物
• A clean environment can help the city bid for the Olympics, _____ in turn will promote its economic
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• 叶片制造的有机物是通过茎里的（）向下运输的．A．细胞间隙B．导管C．筛管D．形成层-生物
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• 当蚕豆萌发出2厘米长的幼根时，用绘图墨水从离根的尖端2.5毫米处开始画8条等距离横线，继续置于适宜条件下使之生长。一段时间后，幼根又长了几厘米，横线之间的距离为下列哪-七年级生物