候选关键字的属性可以有A．0个 B．1个 C．1个或多个 D．多个

论述日本近代法律体系的确立。

We were pleased to hear the good news.

A. sad                 B. happy                 C. nervous

Finding information in today's world is easy. The ________ is how you can tell if the information

you get is useful or not.[      ]

A. ability  

B. competition

C. challenge  

D. knowledge

自助餐食品台布置尤为讲究，食品摆放顺序井然，依次为（）。

A.色拉、开胃菜、汤、热菜、烤肉、甜点和水果

B.开胃菜、色拉、汤、热菜、烤肉、甜点和水果

C.汤、色拉、开胃菜、热菜、烤肉、甜点和水果

D.水果、色拉、开胃菜、热菜、烤肉、汤和甜点

简述转炉炉衬的蚀损机理及提高炉龄的主要措施。