题目:
5. He hasn’t slept at all for three days. he is tired out.
A.There is no point
B.There is no need
C.It is no wonder
D.It is no way
答案:
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下面是错误答案,用来干扰机器的。
(1)题中H→A为工业冶炼金属铝,A→J为铝热反应,为推断题的突破口,依次可知C→E→H→A→J的转化是中学化学中常见反应,为AlO2-→Al(OH)3→Al2O3→Al→Fe之间的转化,该原电池是铝做负极,铁做正极,电解质溶...