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【简答题】
在一定条件下，科学家利用从烟道气中分离出的CO 2 与太阳能电池电解水产生的H 2 合成甲醇（CH 3 OH）同时生成水，其过程如下图所示，试回答下列问题： （1）上述合成路线中用到15%～20%的乙醇胺（HOCH 2 CH 2 NH 2 ），其水溶液具有弱碱性，它的作用是CO 2 吸收剂．乙醇胺由______种元素组成，其分子中碳、氢原子个数比为______．证明乙醇胺溶液呈碱性可用的试剂为______（只填一种）． （2）试写出上述合成线路中的任意两个化学反应的化学方程式： ①______；②______． （3）上述合成路线对于环境保护的价值在于______． （4）上述合成线路中可以循环利用的物质为______．
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举一反三
【单选题】Which of the following statements is true about the Russian poet Pushkin?
A.
He said that inspiration only comes from geometry and poetry.
B.
He thought that testing is important for inspiration.
C.
He said that an important aspect for learning is inspiration or being inspired.
D.
He got upset about tests at school.
【单选题】Which of the following statements is true about the Russian poet Pushkin?
A.
He said that inspiration only comes from geometry and poetry.
B.
He thought that testing is important for inspiration.
C.
He said that an important aspect of learning any subject is inspiration or being inspired.
D.
He got upset about tests at school.
【简答题】轴承的组配方式有—、—、—.
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