0  445624  445632  445638  445642  445648  445650  445654  445660  445662  445668  445674  445678  445680  445684  445690  445692  445698  445702  445704  445708  445710  445714  445716  445718  445719  445720  445722  445723  445724  445726  445728  445732  445734  445738  445740  445744  445750  445752  445758  445762  445764  445768  445774  445780  445782  445788  445792  445794  445800  445804  445810  445818  447090 

1.(樂山)如圖所示,A、B、C、D、E、F均是初中化學(xué)常見物質(zhì)。A與B發(fā)生的是復(fù)分解反應(yīng),B與C發(fā)生的是中和反應(yīng),F(xiàn)是人體正常生理活動必不可少的一種鹽。

結(jié)合圖中信息,回答有關(guān)問題:

(1)E的化學(xué)式為      

(2)A與B反應(yīng)的化學(xué)方程式為        ;

(3)C與D反應(yīng)的化學(xué)方程式為         。

答案:(1)H2O ;(2)Na2CO3+2HCl=2NaCl +H2O +CO2↑;(3)CO2+2NaOH= Na2CO3+ H2O。

試題詳情

120.tidy up整理,收拾

  She decided to tidy up the upstairs rooms.

試題詳情

119.tell apart區(qū)分,辨別

  The teacher could not tell the twins apart.

試題詳情

118.tear down拆除

  Did they tear the building down?

  tear up撕碎,連根撥起

  I'm afraid I’ve torn it up.

試題詳情

117.sweep away沖走,卷走,掃除

  The dust has all been swept away.

試題詳情

116.suspect sb.of懷疑某……

  I suspect him of killing the girl.

試題詳情

115.supply sth.to/for向……提供

  The school supplies books for the children.

試題詳情

114.stare at盯著,凝視

  The little girl stared at the toys in the window.

試題詳情

113.spread out展開,鋪開,延伸

  Spread out your fingers.

試題詳情

112.slow down減慢,減速,慢下來

  Slow down when you come to the main road.

試題詳情


同步練習(xí)冊答案