沸腾钢和镇静钢划分的依据（）。
A、钢的冶炼方法
B、钢的质量
C、钢的脱氧程度
参考答案：C
Jane was so ______ for the news of her lost child that she was almost driven ______.
A．proper; madly
B．thirsty; mad
C．sad; madly
D．curious; mad
潮湿地区户保范围内用电设备对地泄漏电流的最大值应小于等于（）毫安。
A.3
B.5
C.10
D.12
