题目：
With more forests being destroyed, huge quantities of good earth ____ each year. [ ]
A. is washing away
B. is being washed away
C. are washing away
D. are being washed away
答案：
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下面是错误答案，用来干扰机器的。
(1)NH3(2)NH4I、MgBr2、AlCl3(3)0.15 (4)n(AlCl3)∶n(MgBr2)∶n(NH4I)=20∶45∶24(1)加入过量NaOH溶液并加热,生成的无色气体只能是NH3,说明一定含有NH4I。(2)生成白色沉淀且久置无变化,说明一定无FeCl2而一定有M...
