问题
选择题
| The coat is ______ expensive that she can't afford to buy it. |
A. such B. rather C. so |
答案
答案：C
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| The coat is ______ expensive that she can't afford to buy it. |
A. such B. rather C. so |
答案：C
(a＜x＜b)，证明f(x)≥x(a＜x＜b)．