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

单项选择题
完形填空
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__.
小题1:
A.builtB.formedC.repairedD.damaged
小题2:
A.difficultB.easyC.foolishD.shy
小题3:
A.longB.oftenC.muchD.soon
小题4:
A.unusualB.harmfulC.worthlessD.unkind
小题5:
A.hardlyB.evenC.onlyD.such
小题6:
A.senseB.brainC.weightD.feeling
小题7:
A.apologizedB.explainedC.offeredD.expressed
小题8:
A.strange B.fatalC.variousD.dangerous
小题9:
A.signB.injuryC.causeD.symptom
小题10:
A.WheneverB.UnlessC.SupposeD.Although
小题11:
A.neglectedB.acceptedC.seizedD.wasted
小题12:
A.madB.lostC.abroadD.dead
小题13:
A.orderB.excuseC.agreementD.apology
小题14:
A.noteB.cardC.checkD.photo
小题15:
A.shouldB.didC.hadD.was