— He is eager to try something he has never tried before. — Oh, I see. That's ____ he's di

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• Having arrived at the earthquake-stricken area, we were led to ____ the homeless people lived. [ ]A.
• 植物个体发育的顺序是（）A．受精卵→胚乳→植株B．受精卵→胚→植株C．胚→胚乳→植株D．胚乳→胚→植株-生物
• 下图为某农田生态系统的食物网，请据图分析回答(1)春季，农民通过播种育秧种植水稻，水稻的生殖类型属于_________生殖。(2)该食物网中属于不完全变态发育的生物是_________。-八年级生物
• 植物个体发育的顺序是[]A．受精卵→胚乳→植株B．受精卵→胚→植株C．胚→胚乳→植株D．胚乳→胚→植株-八年级生物
• The road is covered with snow. I can't understand ______ they insist on going by motor-bike. [
• You should try to get a good night's sleep _____ much work you have to do. [ ]A. however B. no
• — I prefer shutting myself in and listening to music all day on Sundays.— That's _____ I don�
• 植物个体发育的正确顺序是（）A．种子--幼苗--植株B．胚--幼苗--植株C．受精卵--胚--植株D．胚乳--胚--植株-生物
• You are saying that everyone should be equal, and this is ________ I disagree. [ ]A. why B. whereC.
• Have you ever wondered _____ there are so many natural disasters across the world in 2010? [ ]A. whi
• We cannot figure out _____ quite a number of insects, birds, and animals are dying out. [ ]A. that B
• The old lady's hand shook frequently. She explained to her doctor ____ this shaking had begun h
• 下列属于有性生殖方式繁殖的生物是（）A．扦插的葡萄B．用种子繁殖的玉米C．用叶繁殖的椒草D．嫁接的桃-生物
• We cannot figure out __quite a number of insects, birds, and animals are dying out.[ ]A. that B. asC
• —Hi, Peter. You seem to have gained a lot of weight.— Well, good food, not enough exercise. That
• In peace, too, the Red Cross is expected to send help _____ there is human suffering. [ ]A. whoever
• 无性生殖和有性生殖的本质区别是（）A．有无生殖细胞的形成B．是否由单一个体完成C．是否产生品种单一的后代D．有无两性生殖细胞的形成与结合-生物
• 目前，下列植物只能用种子繁殖的是（）A．水稻B．梨树C．葡萄D．月季-生物
• Parents are taught to understand ______ important education is to their children's future.[ ]A.
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• 下列植物的繁殖方式，属于有性生殖的是[]A．土豆块茎繁殖B．柳条扦插C．杂交水稻D．石榴的压条繁殖-八年级生物
• I'm afraid he's more of a talker than a doer, which is _____ he never finishes anything. [
• 植物的精子和卵子结合成受精卵的过程，叫做______．-生物
• Why not try your luck downtown, Bob? That's _____ the best jobs are. [ ]A. where B. what C. whe
• The last time we had great fun was ____ we were visiting theWater Park.[ ]A.where B. how C. whenD. w
• 经过________结合的生殖过程，叫做有性生殖；是一种________的生殖方式。-八年级生物
• Twenty students want to attend the class that aims to teach _____to read first. [ ]A. what B. who C.
• 如图所示的是某种生殖方式，请据图回答：（1）该图表示的生殖方式是______生殖．（2）若此图表示绿色开花植物的生殖过程，精子和卵细胞结合产生的______将发育成______．-生物
• How can you expect to learn anything ____ you never listen? [ ]A. in case B. even if C. unless D. wh
• 下列植物的生殖方式是有性生殖的是[]A．椒草的叶能长成新植株B．向日葵通过种子繁殖C．月季可用枝条来扦插繁殖D．桃可用嫁接来繁育优良品种-八年级生物
• They decided to cycle along the Mekong River from _____ it begins to _____ it ends. [ ]A. what; what
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• You are saying that everyone should be equal, and this is _____ I disagree. [ ]A. why B. where C. wh
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• 自20世纪70年代以来，生物科学高速发展，新成就层出不穷．1978年诞生的世界上第一例“试管婴儿”，为不孕症患者带来了福音；1996年第一只克隆动物“多利”问世，证明了高度分化的-生物
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• 关于受精卵的叙述正确的是[]A．受精卵是花粉和胚珠结合而成的B．受精卵是胚珠中的卵细胞和花粉管中的精子结合而成的C．受精卵是精子与子房结合而成的D．卵细胞不与精子结合也能形-八年级生物
• —Do you think it wise for Chinese parents to try to do everything for their children? —No, that'
• 填一填（1）人们从一池塘中挖出一段藕，埋入另一池塘的泥层里，一段时间后，就能得到满塘的新藕，这种繁殖方式属于______．（2）你吃过鲜美的水蜜桃吗？一株成熟的桃树要结出桃子，-八年级生物
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