发展两岸关系和实现和平统一的基础是[ ]
A、坚持一个中国原则
B、和平统一，一国两制
C、两岸和平谈判
D、陈水扁下台
答案：A
低碳钢淬火后可磁导率降低，不宜采用（）。
—Would you like some more rice?
—_________. I've had enough.[ ]
A. You are right
B. I think so
C. No,thanks
D. You're welcome
