Mother's Day is an important holiday all over the world. The idea for Mother's Day 1 an American woman named Anna Jarvis. Anna hoped there would be a day for people to show 2 to their mothers, so she wrote many letters to important people of her time. In 1914, the second Sunday in May was celebrated as Mother's Day. People in Denmark, Ital, Turkey, Australia and Belgium all celebrate Mother's Day on the same day as Americans. The day gives people a good 3 to thank mothers. People of all ages do many things to make the day special for their mothers. A typical way is to make Moms stay 4 in bed. That means a mother doesn't need to 5 early to make breakfast for her family. 6, the rest of the family make breakfast for her. Kids do secret things to 7 their moms. They write love letters to their moms. Some even make gifts themselves for their moms. Anna Jarvis's mother 8 carnations, so people chose carnations as a present for their mother on Mother's Day. Carnations of different 9 have different meanings. People buy red carnations if their mothers are 10. However, white ones are used to express love to dead mothers.

股票每天的涨、跌幅均不能超过10%，即当涨了原价的10%后，便不能再涨，叫做涨停；当跌了原价的10%后，便不能再跌，叫做跌停．已知一只股票某天跌停，之后两天时间又涨回到原价．若这两天此股票股价的平均增长率为x，则x满足的方程是（　　）