问题
名词解释
传代
答案
参考答案：
原代培养的细胞生长比较缓慢，而且繁殖一定的代数后（一般10代以内）停止生长，需要从更换培养基。将细胞从一个培养瓶转移到另外一个培养瓶即称为传代或传代培养。
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传代
参考答案：
原代培养的细胞生长比较缓慢，而且繁殖一定的代数后（一般10代以内）停止生长，需要从更换培养基。将细胞从一个培养瓶转移到另外一个培养瓶即称为传代或传代培养。
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| Jim is an American boy. He likes 1 football matches, 2 he hasn't enough money to buy tickets. He has to watch the matches 3 TV at home when he has 4 homework. He must go to school from Monday to Friday, so he missed a lot of important football matches. A big football match would be held (举行) in the afternoon the next day. 5 wanted to watch it very much. But he couldn't. He would have a physics test in 6 afternoon. "Can we have a video, mom?" Jim asked his mother 7 he went to school." Then from our TV set you can record the match for me." "I'm 8 we can't afford (买得起) one," said his mother. The next morning Jim went home with a smile, 9 a new video."But where did you get the money, Jim?" His mother asked in surprise. "That's 10 , mom. I sold our TV set." | ||||
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