题目内容
(请给出正确答案)
[单选题]
_______ more than one hundred elements are known, only twenty-five of them are common and important.
A.Because
B.If
C.Although
D.Whether
答案
C、Although
解析:
解析:句意:虽然我们知道百余种元素,但是他们中仅仅只有二十五种是常见的、重要的元素。Although 表转折,虽然
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