问题 多项选择题 案例分析题

病历摘要:男性患者,28岁,反复口腔粘膜白膜2个月。伴低热、盗汗、腹泻。起病前半年有到南非旅游史,并有不洁性生活史。体查:口腔粘膜表面可见大量凝乳状白色假膜,易剥离,其下为鲜红色的糜烂面。全身浅表淋巴结肿大。

艾滋病的传途径有()

A.蚊子叮咬

B.握手

C.性接触

D.血及血制品传染

E.母婴传染

F.共用游泳池

答案

参考答案:C, D, E

填空题

人类发展的历史进程中人们不断研制出各种不同的用具,制造用具的材料也在不断地发生变化,金属制品因其美观、耐用、轻便易成型而被人们广泛利用,请根据所学知识及生活知识参与有关金属制品探究。

(1)以下工具的制作过程中没有发生化学变化的是                   

A. 原始人制作石刀 B.冶炼青铜 C. 炼铁

(2)请将以下金属材料的冶炼按年代的先后顺序排序               (填序号)。

A. 铁 B.青铜 C.铝

从以上顺序可以看出,金属制品的出现顺序与              有关,那么金属钾的制得应排在               之后。

(3)金属区别于非金属的主要物理性质是,金属具有                         ,金属区别于非金属的主要化学特征是                        。在化学变化中金属原子通常表现为                                               

(4)孔雀石主要成分为碱式碳酸铜,经加热会发生反应:Cu2(OH)2CO32CuO+H2O+CO2↑,古代人们发现翠绿的孔雀石在森林大火中会变成红色的铜,请写出转化为铜的另一个反应方程式:                      

                                          

(5)古代术士将炉甘石(主要成分为ZnCO3)与赤铜矿(Cu2O)、木炭放在炼炉中高温灼烧,炼出金光灿灿的“黄金”,被称为“炼石成金”。

①请你用学过的知识回答,真的可以“炼石成金”吗?                                                      

②那么你认为这金光灿灿的金属是什么?它是怎么炼出来的?写出有关化学方程式。该金属可能是              ,炼出它的化学方程式为                                                                                        

                                               。

(6)到西汉时期我国的劳动人民又发明了“湿法炼铜”,在西汉刘安所著的《淮南万毕术》中就有“曾青得铁则化为铜”的记载(“曾青”是指铜的化合物),请用反应方程式表示其冶炼原理:                       

(7)磁悬浮的核心技术得制备超导材料。有一种超导材料的化学式为Y2BaCu6O10,它是以YmOn、BaCO3和CuO为原料经研磨烧结而成。假设此过程中所有元素的化合价不变,试填写以下空白:

a. 超导材料Y2BaCu6O10是由                种元素组成的,YmOn的化学式是:                

b.在合成该超导材料的同时还生成一种产物,该物质是                (写化学式)。

阅读理解

阅读理解

     On a typical hot August day in Xianyou County, Fujian Province, Zeng Demei, a retired worker in

his seventies, hurries down a busy street.In his hand is a black leather bag.Zeng opens his bag, taking

out two forms.  1  .

     Each of the forms contains detailed information of a student.On his arrival two hours later a woman

greets him and leads him to her office where another man is waiting.They are the two village officials.

They inspect the forms handed to them by Zeng and immediately recognize the girls.  2  . "It's a pity but

it doesn't matter."says Zeng, who wastes no time in deciding to look for the remaining child, Su Qiuju.

     After half an hour, they stop outside a small house made of mud brick.A middleaged man and a girl

in a faded pink dress greet them.Su Qiuju is eight years old.She was forced to drop out of school after

both her parents died.She is now living with her uncle who cannot afford his own children's education.

However, the year of education Su Qiuju did complete was a successful one._3_.

     When they are about to leave, Zeng says, "I must find a supporter for this girl to sponsor her

education."Zeng has made it his retirement task to help children complete their schooling.Back in 1999,

Zeng took part in a campaign started by the local women's organization to help students from poor

families. __4 _.

      His task had begun and since then he has spent his time persuading his friends and neighbors and

others to donate money."To me, children's education is the most important. __5 _. I have to find

sufficient funding before the school opens in September."

     When asked how long he will keep up his vital work as the community's guardian angel, he has a

simple reply."Not until my eyes can't see, and my feet can't move."

A. They were having problems with their schoolwork

B. These are for the two girls he's going to visit this morning

C. They live in a small village not very far, though only one of the girls is still living at home

D. She displayed a talent for handwriting, writing her threecharacter name neatly and beautifully

E. The thought of students dropping out of school bothers me so much that I can't get to sleep at night

F. Of course, some people question why I would want to give up my retirement to go to so much trouble

G. He was so overcome by the tough situation of many poor children that he donated all his money to help out a girl