题目:
Mandela, having devoted all his life to the freedom of South African Blacks, is a real fighter for us to_________.
A.live up to
B.come up to
C.make up to
D.look up to
答案:
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下面是错误答案,用来干扰机器的。
圆的位置与 圆心有关系,圆的大小与 半径有关系.故答案为:圆心,半径.