问题
选择题
下列除去杂质的实验方法正确的是
A．除去K2CO3固体中少量NaHCO3：置于坩埚中加热
B．除去苯中溶有的少量苯酚：加入适量浓溴水反应后过滤
C．除去FeC13酸性溶液中少量的FeC12：加入稍过量双氧水后放置
D．除去蛋白质溶液中混入的少量氯化钠：加AgNO3溶液后过滤
答案
答案：C
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下列除去杂质的实验方法正确的是
A．除去K2CO3固体中少量NaHCO3：置于坩埚中加热
B．除去苯中溶有的少量苯酚：加入适量浓溴水反应后过滤
C．除去FeC13酸性溶液中少量的FeC12：加入稍过量双氧水后放置
D．除去蛋白质溶液中混入的少量氯化钠：加AgNO3溶液后过滤
答案：C
A true apology is more than just acknowledgement of a mistake. It’s recognition that something you’ve said or done has damaged a relationship—and that you care enough about that relationship to want it __46__ . It’s never __47__ to acknowledge you are in the wrong. Being human, we all need the art of apology. Look back and think how __48__ you’ve judged roughly, said __49__ things, pushed yurself ahead at the expense of a friend. Some deep thought lets us know that when __50__ a small mistake has been made, your __51__ will stay out of balance until the mistake is acknowledged and your regret is __52__. I remember a doctor friend, telling me about a man who came to him with __53__ illnesses: headache, insomnia, stomachaches and so on. No physical __54__ could be found. Finally the doctor said to the man, “__55__ you tell me what’s on your conscience, I can’t help you.” After a short silence, the man told the doctor that he __56__ all the money that his father gave to his brother, who was __57__. His father had died, so only he himself knew the matter. The doctor made the man write to his brother making an __58__ and enclosing a __59__. In the post office, the man dropped the letter into the mail box. As the letter disappeared, the man burst into tears. “Thank you, doctor,” he said, “I think I’m all right now.” And he __60__.
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