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问题 选择题

铁溶于一定浓度的硝酸溶液时，发生反应的离子方程式为：aFe+bNO3-+cH+=dFe2++fFe3++gNO↑+hNO2↑+kH2O．下列有关推断中，不正确的是（　　）

A．2d+3f=3g+h

B．反应中每消耗5.6gFe，转移0.2mol～0.3mole-

C．HNO3的氧化性大于Fe3+

D．当a不变时，d随着b的增大而减小

答案

A、Fe元素的化合价由0升高到+2和+3，N元素的化合价由+5降低到+2和+4，则由电子守恒可得2d+3f=3g+h，故A正确；

B、5.6gFe的物质的量为0.1mol，若产物中只有亚铁离子，则转移的电子数为0.2mol，若产物中只有三价铁离子，则转移的电子数为0.3mol，由离子反应可知产物中有Fe2+、Fe3+都有，则转移0.2mol～0.3mole-，故B正确；

C、该反应中硝酸是氧化剂，Fe3+是氧化产物，则氧化性HNO3＞Fe3+，故C正确；

D、由铁原子守恒可知，a=f+d，电荷守恒为c-b=2d+3f，a=

c-b-2d
3
+d=
c-b+d
3
，则a不变时d随着b的增大而增大，故D错误；

故选D．

单项选择题 A1/A2型题

在高干病房，一些医护人员称呼患者总是用"赵书记"、"钱局长"等，语调适中，而到了一般病房，称呼就换成了"3床"、"做肠透视的"等，话语十分生硬。从深层次上说，此类现象的本质和解决措施是（）

A.敬业精神差，应加强管理

B.语言不文明，应加强培训

C.尊重意识差，应加强教育

D.公正意识差，应加强教育

E.服务意识差，应加强教育
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单项选择题

This was one of my experiences (1) . When I was in my 30s, I was working for a large international company which had its head office in London. I was working in the (2) department.

The company had a training centre which was just outside London. Different courses were held there throughout (3) and I (4) go on one training course a year. These usually started (5) a Sunday evening and lasted six days.

Once I was (6) a week’s training course with about forty (7) sales people. I was in the bar on the Friday evening and suddenly a woman who was (8) behind the bar asked mea curious question. "I hope you don’t (9) my asking," she said, "but I’ve been (10) about it all week. Have you got a sister (11) Mary" The woman’s name was June. And she used to do various jobs at the training centre. She worked in the office, she organized all the food and drink for the centre and she worked in the bar at lunchtime and in the evening.

My answer (12) June’s question was "Yes", and June said, "I thought (13) . I met her last September when she was organizing a course here. " At that time, my sister was working for (14) company but in a different part of the country. That was (15) she came to be at the training centre.

(16) surprised me was how June guessed we were brother and sister. Three things made it even more (17) . First, she had met my sister six months before she met me. Second, they have about sixty new people every week at the training centre. So about one thousand five hundred people had (18) the centre in those six months. And (19) , my sister is married, so she doesn’t have the same family name as me.

We’re not (20) , but I guess we must look quite like each other.

1().

A．in work

B．out of work

C．at work

D．about work
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