对于明显偏离正态性和方差不齐的资料，通常选用的处理方法是（）
A.变量变换
B.t检验
C.u检验
D.F检验
E.q检验
参考答案：A
that he was praised by his teachers.
A．So great progress had he made
B．So great progress he had made
C．Such a great progress had he made
D．Such great progress had he made
我国明代著名航海家郑和是( )人。
A．回族 B．汉族 C．蒙古族 D．壮族
