散射光分为（） A.后向角散射 B.前向角散射 C.反向角散射 D.侧向角散射 E.

下列对相关实验现象的描述错误的是（　　）

A．在石灰石上滴上盐酸有大量气泡产生

B．红磷在空气中燃烧有大量白烟产生

C．在硫酸铜溶液中滴加氢氧化钠溶液有白色沉淀产生

D．将二氧化碳通入含紫色石蕊试液的水中，溶液变成红色

请按照题目要求打开相应的命令，完成下面的内容。具体要求如下：
*******本套题共有4小题*******
在“模拟试卷六”文件夹中，存有文档WR1.DOC，其内容如下；
【文档开始】
中文Windows2000实验
中文文字处理Word2000实验
中文电子表格Excel2000实验
Internet网络基础实验
【文档结束】
按要求完成下列操作：
(1)新建文档，插入文件WR1.DOC的内容，设置为五号黑体、加粗、居中，行间距为 1.5倍行距，存储为文件WR2.DOC。
(2)新建文档，插入文件WRI．DOC的内容，将全文各段加项目符号●，存储为文件 WR3.DOC。
(3)制作5行4列表格，列宽2.5厘米，并存储为文件WR4.DOC。
(4)新建文档WR5.DOC，插入文件WR4.DOC的内容，删除最后一行，设置表格线为蓝色，底纹为灰色，存储为文件WR5.DOC。

If you had been in my classes in the early McKee days , you would have seen a skinny young man in his late twenties with messy black hair , eyes that looked with a sign of infection , bad teeth and the hangdog look you see on immigrants in Ellis Island photographs or on pickpockets being arrested .

There were reasons for the hangdog look .

I was born in New York and taken to Ireland before I was four . I had three brothers . My father , an alcoholic , wild man , great patriot , always ready to die for Ireland , abandoned us when I was ten . A baby sister died , twin boys died , two boys were born . My mother begged for food , clothing , and coal to boil water for the tea . Neighbors told her to place us in an orphanage , a place for homeless kids . No , no , never . The shame of it . She hung on . We grew . My brothers and I left school at fourteen , worked , dreamed of America and , one by one , sailed away . my mother followed with the youngest , expecting to live happily ever after . That’s what you are supposed to do in America , but she never had a moment of happy-ever-after .

In New York I worked at laboring jobs till I was put into the United States Army . After two years in Germany I went to college on the GI Bill program to become a teacher . In college there were courses on literature and composition . There were courses on how to teach by professors who did not know how to teach . After college I went to McKee , where I put what I had learnt to trial and embarrassed myself when the students considered me a fool .

小题1:. What is a hangdog look ?

A．happy

B．disappointed

C．discouraged

D．angry小题2:. It can be inferred from this passage that __________ .

A．before the author went to Ireland , he lived in New York .

B．the mother is living a joyful life in America with her little son

C．there are four sons in this Irish family living in America

D．the author is now a young teacher in his twenties teaching in a high school小题3:. Which of the following statements is TRUE ?

A．Someone recommended the mother give the children away to kind people .

B．The author’s father sacrificed himself for his beloved homeland .

C．The author got into college because he was hard-working .

D．The author didn’t know much about how to teach when he first started .小题4:. In what way is the passage mainly developed ?

A．Presenting effects and analyzing the causes .

B．Giving typical examples .

C．Describing things in space order .

D．Presenting an idea and arguing in favor of it .

有关抑郁症的发病机制，以下说法正确的是（）。

A.抑郁发作时有5-羟色胺升高

B.抑郁发作时有5-羟色胺降低

C.抑郁发作时有去甲肾上腺素升高

D.抑郁发作时有多巴胺代谢产物降低

E.抑郁发作有多巴胺代谢产物升高

配臵保护子网的实质是（）。