1.(乐山)如图所示,A、B、C、D、E、F均是初中化学常见物质。A与B发生的是复分解反应,B与C发生的是中和反应,F是人体正常生理活动必不可少的一种盐。
结合图中信息,回答有关问题:
(1)E的化学式为 ;
(2)A与B反应的化学方程式为 ;
(3)C与D反应的化学方程式为 。
答案:(1)H2O ;(2)Na2CO3+2HCl=2NaCl +H2O +CO2↑;(3)CO2+2NaOH= Na2CO3+ H2O。
120.tidy up整理,收拾
She decided to tidy up the upstairs rooms.
119.tell apart区分,辨别
The teacher could not tell the twins apart.
118.tear down拆除
Did they tear the building down?
tear up撕碎,连根拨起
I'm afraid I’ve torn it up.
117.sweep away冲走,卷走,扫除
The dust has all been swept away.
116.suspect sb.of怀疑某……
I suspect him of killing the girl.
115.supply sth.to/for向……提供
The school supplies books for the children.
114.stare at盯着,凝视
The little girl stared at the toys in the window.
113.spread out展开,铺开,延伸
Spread out your fingers.
112.slow down减慢,减速,慢下来
Slow down when you come to the main road.
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