题目

 Many poor families lost their farms because of storms. So they traveled west to California ________ a better life.   A．in honor of       B．in danger of     C．in search of  D．in memory of 答案：C下列运算中属于同底数幂相乘的是（　　）A．（-a）2?a2B．-a2?（-a）3C．-x2?x5D．（a-b）2?（b-a）3