题目

阅读理解阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。 The Price of Success One problem for schools is that many students do not want to study hard. As a result, they perform (表现) poorly in their classes. This is especially true in the United States, where average scores for math and science are lower than in many other countries. In recent years, schools and charities have been looking for ways to help students get better grades in these subjects. An organization called the LMD Foundation introduced a program called Learn and Earn rec19．随着人们对物质生活的追求，加上资源的紧缺和原材料价格的上涨，房价不断攀升，黔西县某房地产公司的房价由每平方米售价2500元，经过连续两次涨价后，变为每平方米3600元．求平均每次涨价的百分率是多少？