13岁，花一样的年华，本该做着七彩斑斓的梦，但严慧却早早扛起了家庭的重担，6岁时，小慧的妈妈离家出走，爸爸在外打工，她就一个人承担起照顾失明奶奶的责任。2015年11月，小慧的爸爸因病去世，家中唯一的经济来源也断了，还欠下20多万的债务。生活的不幸没有把她打垮，反而让她变得更强大。对于巨额债务，她承诺“我以后赚了钱肯定一分一分还清”；在家里，她除了照顾奶奶的饮食起居，还要除草、种菜、做饭、洗衣服；在校内，她勤奋好学，成绩优异；在校外，她时时处处做“小雷锋”，扶助老弱病残等。

柔弱的肩膀，强大的力量。我们应该怎样以她为榜样，成为一个力量强大的人？

胚胎干细胞的特点是（　　）

        Tom and Fred were talking about the year 2050.
　　“What will 1 be like in the year 2050?” asked Tom.
　　“I don't know,” said Fred. “What do you think?”
　　“Well, no one knows. But it is 2 to guess,” said Tom. “In the year 2050 everybody will carry a pocket (袖珍) 3. The computer will give people the 4 to all their problems. We shall all have telephones in our pockets,5 . And we'll be able to talk to our friends all over the world. Perhaps(也许) we’ll be able to 6 them at the same time. Machines will do 7of the work, and people will have more8. Perhaps they will work only two or three days a week. They will be able to fly to the moon by spaceship and spend their holidays there.”
　　“I'm very 9to hear that. I hope to fly to the moon. And I hope I'll be able to live 10,” said Fred. “Won't that be interesting? Just like a fish.”