提高溅渣层MgO含量，炉渣对溅渣层可（）侵蚀。
A.减轻
B.加剧
C.没有影响
参考答案：A
Lucy is ________ more outgoing than Lily. [ ]
A. little
B. a little
C. few
D. a few
※ [47]150～300 . (30 )
