Whenwelearnedthatitwasnot
問題詳情:
When we learned that it was not ____we would go to a restaurant of luxury, we all felt on the top of the world because it was ______we last enjoyed ourselves.
A. long before; before long that B. long before; long before that
C. before long; not long before D. before long that; not long before
【回答】
B
知識點:連詞
題型:選擇題
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近日我州某地成功處置了一輛滿載三*化*(PCI3)的車輛洩漏事故.三*化*是一種重要的無機鹽工業產品,無*液體...
問題詳情:近日我州某地成功處置了一輛滿載三*化*(PCI3)的車輛洩漏事故.三*化*是一種重要的無機鹽工業產品,無*液體、密度1.574g/cm3(21℃),熔點﹣112℃,沸點75.5℃,易燃.遇水反應生成亞**(H3PO3)和*化*,與有機物接觸會著火.下列對三*化*的說法錯誤的是()A.三*化*中*元素的化合價為+...
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在恆溫、體積為2L的密閉容器中進行反應:2A(g)⇌3B(g)+C(g),若反應物在前20sA物質由3mol降...
問題詳情:在恆溫、體積為2L的密閉容器中進行反應:2A(g)⇌3B(g)+C(g),若反應物在前20sA物質由3mol降為1.8mol,則前20s的平均反應速度為()A.v(B)=0.03mol/(L•s)B.v(B)=0.045mol/(L•s)C.v(C)=0.03mol/(L•s)D.v(C)=0.06mol/(L•s)【回答】考點:化學反應速率和化學計量數的關係.專題:化學反應速率專...
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設複數(是虛數單位),則複數的虛部為( )A. B. C. ...
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反比例函式與直線相交於點點的橫座標為,則此反比例函式的解析式為( ) A. ...
問題詳情:反比例函式與直線相交於點點的橫座標為,則此反比例函式的解析式為( ) A. B. C. D.【回答】C;知識點:反比例函式題型:選擇題...
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