实体是 ______ ，可以是具体事物，也可以是抽象的概念。
参考答案：数据的载体
—Why do you think he can succeed?
—He believes in himself, ____ is the most important, I think. [ ]
A. which
B. what
C. that
D. who
放浪形骸fàng làng xíng hái
