题目

He insisted on going abroad to have further study _______ his parents' objection． A．by means of                                           B．in favor of C．regardless of                                           D．for the purpose of 答案：C下列运算中正确的是（ ）A．a2•a3=a6 B．a6÷a=a6 C．（a3）2=a6 D．（-2a3）2=-4a6