题目:
I ______ all my money when shopping, so I had to walk home yesterday. |
A. cared for B. ran out of C. gave away D. got out of |
答案:
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①H2O、CO2、H2、CO②黑色固体变成红色③验证水煤气含有水蒸气 通过验证生成物中有水蒸气来证明水煤气中含有氢气将玻璃管改成尖嘴点燃或收集题目分析:(1)根据图示,结合资料可知,用A无水硫酸铜来检验水的存...