抗渣性是耐火材料在高温下抵抗钢渣()的能力。
参考答案:化学侵蚀
____Lucy____you can't go to the party. One of you has to stay at home to look after your grandma.
A.Neither;nor
B.Either;or
C.Not only; but also
(),是人生的依托,是社会的细胞。