正确答案: C

除去FeCl2溶液中混有的FeCl3：加入过量铁粉，过滤

题目：下列除去杂质的方法正确的是

解析：CO2可以被澄清石灰水吸收，而CO不可以，故A项错。盐酸可以将BaCO3反应除去，而不能溶解BaSO4，故B项错；C项，2FeCl3 + Fe = 3FeCl2,过量的铁过滤，即可除去，正确；Cu和CuO均可以被HNO3溶解，故D项错。

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举一反三的答案和解析：

[单选题]I was ten when I first sat with my grandmother behind the cashier（收银台）in her general store. 71 I quickly learned the importance of treating customers politely and saying “thnak you.”At first I was paid in candy. 72 I worked every day after school, and during the summer and on weekends and holidays from 8 a.m. to 7 p.m. My father helped me set up a bannk account. 73

Before long, she let me sir there by myself.

[单选题]鼠李科与葡萄科的区别之一在于是否具花盘。( )

错误

解析：解析：将“花盘”改为“卷须”或“浆果”等。

[单选题]一朵花中由几个分离的心皮构成的雌蕊属于复雌蕊。( )

错误

[单选题]阅读下列短文，从每题所给的四个选项（A、

B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。

A