下列属于有性生殖的是（）A．椒草的叶片长成新植株B．马铃薯块茎发芽生根C．桃树种子的胚发育成新植株D．竹地下茎节上的芽长成新的竹子-生物

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• 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
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• The road is covered with snow. I can't understand ______ they insist on going by motor-bike. [
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• You are saying that everyone should be equal, and this is ________ I disagree. [ ]A. why B. whereC.
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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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