1.(樂山)如圖所示,A、B、C、D、E、F均是初中化學常見物質。A與B發(fā)生的是復分解反應,B與C發(fā)生的是中和反應,F(xiàn)是人體正常生理活動必不可少的一種鹽。
結合圖中信息,回答有關問題:
(1)E的化學式為 ;
(2)A與B反應的化學方程式為 ;
(3)C與D反應的化學方程式為 。
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區(qū)分,辨別
The teacher could not tell the twins apart.
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.
117.sweep away沖走,卷走,掃除
The dust has all been swept away.
116.suspect sb.of懷疑某……
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盯著,凝視
The little girl stared at the toys in the window.
113.spread out展開,鋪開,延伸
Spread out your fingers.
112.slow down減慢,減速,慢下來
Slow down when you come to the main road.
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