金属材料在高温下抵抗氧化和烧损的能力称为（）.
A.耐蚀性
B.抗氧化性
C.耐热性
D.塑性
参考答案：B
随着现代科学的发展，排放到空气中的有害气体越来越多，严重污染空气，我省某些地区近年来也不断出现酸雨，请就酸雨的形成原因及防范措施谈谈你的看法．
She had golden hair when she was a child, but_________ she got older and older, her hair went darker and darker．
A．while
B．when
C．after
D．as
