为去除钢坯表面的氧化铁皮，用酸、碱或盐溶液对金属进行浸洗，这种方法称为（）。
参考答案：酸洗
_______ of the teachers in our school is 118 and _________ of them are women teachers.
A．The number, first fourth
B．The number, one fourth
C．A number, first fourth
D．A number, one fourth
新型石灰竖窑，有效容积170m3。
