dhhgh11 当前离线
高级会员
Basalt, which composes most of the ocean floor, is a dark-gray rock rich in iron and magnesium than most surface rocks.
answer: D. But I am wondering how to correct it? I did not find any error for D.
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ppp1 当前离线
pls be sensitive to some words, such as:
看到than--找比较级;
看到same--找as;
看到too,very划线--找that;so--that
还有很多,此题richer
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