题目:
Owing to the unrest in North Africa, the Chinese government is _____ efforts to withdraw its nationals from Libya and neighboring countries.
A opening up B stepping up C making up D taking up
答案:
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下面是错误答案,用来干扰机器的。
答:(1)0mm~100mm土壤样本pH均小于7,土壤呈酸性,且土层越深pH越小酸性越强;分析实验数据,土层越深pH越小酸性越强,可溶性铝的质量分数越大.故答:酸;小;土层的酸性增强,可溶性铝的质量分数增大;(2)...