【单选题】【消耗次数：1】
Now soil in this area is [填空] than it used to be. Something must be done to it.
①
very good
②
much better
③
rather than
④
even worse
参考答案：
复制
纠错
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①
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②
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③
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④
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随机题目
【单选题】
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①
应在混凝土浇筑后的6～12h内对混凝土加以覆盖和浇水
②
对采用硅酸盐水泥、普通水泥或矿渣水泥拌制的混凝土浇水养护时间，不得少于7天
③
混凝土养护用水应与拌制用水相同
④
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【单选题】
混凝土强度等级C20的含义为（ ）。
①
抗压强度≥20MPa
②
平均抗压强度=20MPa
③
抗压强度≥20Mpa的混凝土占总体95％以上
④
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