问题
填空题 案例分析题
据美国《大众科学》网站报道：人造血可能会变成一个常见的事实，因为法国科学家首次成功地将实验室中用造血干细胞培育出的人造血输入了人体内，而且其表现与正常的血液一样。研究发表在《血液》杂志上。
造血干细胞分化是（）的结果。
答案
参考答案：基因选择性表达
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据美国《大众科学》网站报道：人造血可能会变成一个常见的事实，因为法国科学家首次成功地将实验室中用造血干细胞培育出的人造血输入了人体内，而且其表现与正常的血液一样。研究发表在《血液》杂志上。
造血干细胞分化是（）的结果。
参考答案：基因选择性表达
A group of fifteen-year-olds at Sunshine School are holding a charity sale to raise money to help their classmate Lisa. Lisa had cerebral palsy(大脑性瘫痪）when she was a baby. Although Lisa has to use a wheelchair to help her get around, she never gives up. And she is always ready to help others. 、 Lisa has the chance of standing up, but she needs an operation(手术）which will cost lots of money." Lisa’s doctor said. "I never thought that I could stand up one day. Actually the news is surprising for me. However, when I see my parents are worried about the cost of the operation, I am sad. I am used to my life. I don’t mind even if I can’t stand up," Lisa said, "Now ray classmates and some other kind people are helping me. I am really thankful. If I stood up one day, I would try my best to help more people." "While helping Lisa, we can also learn a lot. We have learned how to cook cookies and how to sell them," Betty, one of Lisa’s classmates said. "Now we know making money is not easy, so we won’t waste money anymore." Alex, a boy in Lisa’s class, told a reporter that they could raise about $100 every day. "We have raised about $2,100 so far. We hope we will raise more money for Lisa’s operation," said he.
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