题目

 — Tom, who will give ______ lecture? What is it about?    — Professor Chen, ______ president of Beijing University, about pollution.     A. the, a         B. a, the         C. the, 不填       D. a, 不填 答案:C 已知a=8131,b=2741,c=961,则a、b、c的大小关系是 (    ) A.a>b>c     B.a>c>b     C.a<b<c    D.b>c>a
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