题目

 Most people buy a lot of gifts just before Christmas. But some people think we buy too much. They have started a special day called Buy Nothing Day.    36    .      Buy Nothing Day is November 29. It’s 25 days before Christmas. It’s after Thanksgiving and often the first day of Christmas shopping.    37    .      The idea for Buy Nothing Day started in Vancouver, British Columbia.    38    In California, Parents, and children get together to read stories, sing songs, and paint pictures. The children talk about why they don’t need a lot of toys. This如果一个一元二次方程的根是：x1=x2=1，那么这个方程是（ ）A．（x+1）2=0 B．（x﹣1）2=0 C．x2=1 D．x2+1=0