下列反应属于置换反应的是_刷题宝

题干

下列反应属于置换反应的是（）

A：2HgO 2Hg+O₂↑

B：H₂+CuO Cu+H₂O

C：C2 H₅OH+3 O₂ 2CO₂+3 H₂O

D：C+O₂ CO₂

上一题下一题 0.0难度选择题更新时间:2016-02-19 02:24:49

答案(点此获取答案解析）

B

同类题1

—You look unhappy. Did you fail the tests?
—I ________ the written papers but didn’t pass the oral examination.

同类题2

已知函数f（x）=

{\begin{matrix} | \log_{3} x |, 0 ＜ x \leq 3 \\ - x + 4, x ＞ 3 \end{matrix}

．若a＜b＜c且f（a）=f（b）=f（c），则（ab+2）^c的取值范围是____．

同类题3

— Look at the photo. Do you know __________ 105-year-old lady, Yang Jiang?

— Yes, She was __________ famous writer and translator（翻译家）.

同类题4

The Hotel Al Arab ______ the first and only 7-star hotel in the world was designed in the shape of a sail of 321 meters.

同类题5

两个小数相除，商一定小于1．

小学学科试题库

初中学科试题库

高中学科试题库