赤道横穿大陆中部的洲是[ ]
A．亚洲
B．非洲
C．南美洲
D．大洋州
答案：B
An arbitration award is final and binding upon both parities, therefore, if one party does not get satisfied with the award, it cannot refer the case to the court, so long as the arbitration procedures are legal.（）
炼钢炉渣中三氧化二铝（Al2O3）属于（）性氧化物。
A.酸性
B.弱酸
C.两性
