为保证轴材料的力学性能，应对轴材料进行（）处理。
A.退火或回火
B.调质或正火
C.淬火
D.调质
参考答案：B
Unfortunately, the aboriginal(土著) people tried in vain to win independence ______ the ruling tribe,
and prejudice ______ them still continued.[ ]
A. of, towards
B. on, for
C. from, against
D. by, over
间歇训练法
