5.下列反應(yīng)的離子方程式書(shū)寫(xiě)正確的是( )
A.金屬鈉跟水反應(yīng):
B.向偏鋁酸鈉溶液中加入少量硫酸氫鈉溶液
C.澄清石灰水中滴入少量的NaHCO3溶液
D.濃鹽酸跟二氧化錳混合共熱
4.下列離子反應(yīng)方程式正確的是( )
A.小蘇打溶液中加入過(guò)量石灰水
B.氯化鋁溶液中加入過(guò)量氨水
C.氯化亞鐵溶液中通入氯氣
D.苛性鉀溶液中加入稀醋酸
3.下列離子方程式書(shū)寫(xiě)正確的是( )
A.碳酸氫鈣溶液中加入等物質(zhì)的量的氫氧化鈉溶液
B.碳酸鈉溶液中加入等物質(zhì)的量的乙酸
C.溶液中通入過(guò)量的二氧化硫氣體
D.用碳棒作電極電解氯化鈉飽和溶液
2.某無(wú)色透明的溶液,在pH=0和pH=14的條件下都能大量共存的是( )
A. B.
C. D.
1.下列反應(yīng)的離子方程式不正確的是( )
A.向燒堿溶液中滴加少量氯化鋁溶液
B.物質(zhì)的量相等的溴化亞鐵跟氯氣反應(yīng)
C.硫化鉀晶體溶于水
D.向碳酸鈉溶液中滴加過(guò)量的稀硫酸
9. Do you remember the teacher who taught us English at middle school?
8. He spoke as if he understood what he was talking about.
7. That is where Lu Xun used to live.
6. The news that you told me yesterday was really disappointing.
5. The news that they had won the game soon spread over the whole school.
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