下表选项中,除去物质中所含杂质的方法错误的是( ) 选项物质所含杂质除去杂质的方

题型:选择题

问题:

下表选项中,除去物质中所含杂质的方法错误的是(  )

选项物质所含杂质除去杂质的方法
A.KNO3溶液K2SO4加适量Ba(NO32溶液,充分反应后,过滤
B.MgCl2溶液HCl加适量Mg(OH)2固体,充分反应后,过滤
C.NaCl固体MnO2加水溶解、过滤、蒸发结晶
D.O2CO通过灼热的氧化铜粉末

A.A

B.B

C.C

D.D

考点:物质的除杂
题型:选择题

金融期权交易最早始于______。

A.股票期权
B.利率期权
C.外汇期权
D.股票价格指数期权

题型:选择题

袁某,女,65岁,因肺源性心脏病收住院治疗。护士收集资料时了解到:病人口唇发绀,呼吸困难,食欲缺乏,口腔溃疡,焦虑。应首先执行的护理措施是()。

A.与其交谈,解除焦虑

B.调节食谱,促进食欲

C.通知家属来医院探望

D.行口腔护理促进溃疡愈合

E.吸氧、缓解缺氧

题型:选择题

自行车每小时行a千米,摩托车每小时比自行车多行25千米.

(1)a+25表示______

(2)自行车3小时行的千米数是______

(3)摩托车4小时行的千米数是______.

题型:选择题

服务投标文件一般内容组成与丁程投标文件一般内容组成相同部分包括()。

A.投标保证金

B.联合体协议书

C.投标函及投标函附录

D.技术建议书

E.投标报价文件

题型:选择题

One day a lawyer’s wife fell ill, and he went to get a doctor. The doctor willingly came to see the woman and to do what he could for her, but before he went into the house, he made a short stop. He knew that the lawyer was famous for not paying his bills, even if they were due(正当的).He therefore said to the man.“But if I save your wife, I am afraid you may not pay me.”

“Sir,”replied the lawyer. “Here I have$500,,whether you cure my wife or you kill her. I'll give you all this.”

The doctor was reassured(使安心) and went into the house. When he reached the woman's bedside, it soon became clear to him that he could do little. She was seriously ill, and though he prescribed(开药方) her medicine, she soon died.

He told the lawyer he was very sorry, and then asked for the money which he had promised. “Did you kill my wife?”asked the lawyer. “Of course I didn't,” said the doctor. “Well! Did you cure my wife?” asked the man. “I'm afraid that was impossible,” replied the doctor.“Well, then since you neither killed my wife nor cured her, I have nothing to pay you.”

小题1:One day a lawyer’s wife fell ill, and the lawyer_____ .

A.cured his wife

B.got a doctor for her

C.got some medicine for her illness

D.promised to pay$500 to the doctor小题2:Before entering the lawyer’s house the doctor stopped for a while, because_____ .

A.the doctor wanted to ask something about his wife's illness

B.the doctor thought it impossible to save the woman

C.the doctor was afraid that the lawyer would refuse to pay him

D. the lawyer was too poor to pay his bills小题3:Because the lawyer’s wife was seriously ill, the doctor_____ .

A.couldn’ t do much and didn't save her life

B.tried his best and saved her at last

C.had to do everything he could for her

D.had to spend a lot of time to cure her小题4:From the story, we know_____ .

A.the lawyer was very clever

B.how the lawyer's wife died

C.the doctor was stupid enough to be fooled

D.the lawyer was dishonest and that he fooled the doctor

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