问题 单项选择题 A3/A4型题

患者,男,14岁,从未进行过预防脊髓灰质炎的免疫接种,在夏季后期患此病住进医院。在病情严重时使用了人工呼吸器,恢复时撤掉人工呼吸器,未出现不良影响,几天后,血气、电解质结果如下:[Na<sup>+</sup>]136mmol/L,[K<sup>+</sup>]4.5mmol/L,[Cl<sup>-</sup>]92mmol/L,pH7.32,CO<sub>2</sub>总量36mmol/L,PCO<sub>2</sub>70mmHg。

患者的酸碱平衡紊乱类型是()

A.呼吸性碱中毒

B.代谢性酸中毒

C.代偿性呼吸性酸中毒

D.代谢性碱中毒

E.混合性碱中毒

答案

参考答案:C

实验题

研究性学习小组用Na2SO3与硫酸溶液(硫酸与水体积比1∶1)制备SO2并进行性质探究实验。

(1)D中的实验现象是         ,C、E中溶液都褪色,分别体现SO2           性质。

(2)请在方框中画出收集SO2以及尾气处理装置(标相关试剂)。

(3)研究小组发现B中有白色沉淀,为了清楚沉淀的物质,研究小组往B中加入过量稀盐酸,沉淀不溶解,你认为留下的沉淀物是         ,形成该沉淀的反应方程式有:                                                                                     

为了进一步验证沉淀原因,研究小组另取BaC12溶液,加热煮沸,冷却及时加入少量苯液封,然后再通SO2,结果发现沉淀量减少,但仍有轻微浑浊。研究小组改进A装置(如右图),再进行实验,B中没有出现浑浊。下列气体可作为X气体的是            (填序号,不定项选择)

A.CO2  B.NH3   C.O3   D.N2   E.NO2

(4)SO2为空气污染物,研究小组为测定某工厂区空气中SO2的含量,取10m3(标准状况)的空气,缓慢通过足量溴水中,在所得溶液中加入过量的BaC12溶液,将产生的白色沉淀洗涤、干燥,用电子称称其质量为0.233g,则:

①沉淀洗涤要干净,检验洗涤已经干净的实验操作是                                                                              

②试计算此空气中SO2的浓度(列出计算表达式并计算结果,结果单位用mg/m3表示)。

阅读理解

More American people take their troubles with them on holiday, according to a new survey. Although 40 percent said that the main reason for going away is to escape pressure (压力) from work, almost all said they worry more than they do at home. Only four in every 100 said that they are happy and free of care.

The most common worry is burglary ( 入室盗窃), with four out of 10 worrying about their homes being broken into while they’re abroad. More than a quarter fear they will feel crazy with some other noisy and rough holiday-makers and 22 percent worry they may be attacked or their possessions will be missing. One in five think the car may break down; and the same number worry about the chances of bad weather.

The survey also showed that the stay-at-home Americans are no more. Three out of every five want to have a holiday abroad, a great increase from the figures only three years ago. The hotel holiday is still a winner, with about one third of all Americana preferring to go on a self-catering ( 自助 ) holiday.

56. The underlined word “survey” in the first paragraph most probably means ______.

A. research               B. review            C. exhibition        D. examination

57. According to the text, about ______ of people worry more on holiday than when they are at home.

A. 25%             B. 40%               C. 80%             D. 95%

58. The third most common worry of American holiday-makers is that they may ______.

A. be attacked or lose their possessions  B. have problems with their cars on the road

C. have bad weather on holiday      D. get mixed with some rough fellow holiday-makers

59. Where do American holiday-makers like to stay most?

A. At a hotel.                 B. In a quiet place.         

C. At a friend's house.           D. Where they can cook for themselves.