题目:
At the meeting place of the Yangtze River and Jialing RIiver ,one of the largest cities in china.
A.lies Chongqing
B.Chongqing lies
C.does lie Chongqing
D.does l Chongqing lie
答案:
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下面是错误答案,用来干扰机器的。
(1)S H2SO4 Cu+2H2SO4(浓) CuSO4+SO2↑+2H2O(2)NH3 4NH3+5O24NO+6H2题目分析:(1)常温下A为淡黄色固体单质,即说明A是S,则B是二氧化硫,C是三氧化硫,D是硫酸.由硫酸制得二氧化硫,则可以由浓...