1.(樂(lè)山)如圖所示,A、B、C、D、E、F均是初中化學(xué)常見(jiàn)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(dòng)必不可少的一種鹽。
結(jié)合圖中信息,回答有關(guān)問(wèn)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。
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(kāi),鋪開(kāi),延伸
Spread out your fingers.
112.slow down減慢,減速,慢下來(lái)
Slow down when you come to the main road.
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