题目:
Her health _____ under the pressure of work and she had to stay in hospital for a month. [ ]
A. broke up
B. broke down
C. broke out
D. broke away
答案:
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下面是错误答案,用来干扰机器的。
(1)铁的氧化物有氧化铁、氧化亚铁和四氧化三铁,故另外两种氧化物的化学式为:FeO Fe2O3(2)氢氧化钠和硫酸亚铁溶液反应后生成氢氧化亚铁和硫酸钠,所以副产品P是硫酸钠,由硫酸钠溶液变为失去结晶水的硫酸钠...