题目内容

化学反应式______属于分解反应。

A. 2Fe+O2=2FeO
B. FeO+C=Fe+CO
CuO+H2=Cu-H2O
D. CaCO3=CaO+CO2

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化学反应式______属于分解反应。

A. 2Fe+O2=2FeO B. FeO+C=Fe+CO CuO+H2=Cu-H2O D. CaCO3=CaO+CO2

The profit motive is inherently （）with principles of fairness and equity.

Some of the words employed by Shakespeare in his works have become （）and are no longer used in the present days.

In the past, competition for jobs caused different （）groups to be hostile toward each other.

According to the fourth ad, you may ______. A) buy a fridge for $500 C) pay $800 for two armchairs B) buy all the old pictures for $140 D) pay $1000 for a double bed

A. 2Fe+O2=2FeO
B. FeO+C=Fe+CO
CuO+H2=Cu-H2O
D. CaCO3=CaO+CO2