在自杀的社会学因素中叙述正确的是() A.自杀率随着年龄的增加而降低 B.独身、离婚

题型:单项选择题

问题:

在自杀的社会学因素中叙述正确的是()

A.自杀率随着年龄的增加而降低

B.独身、离婚、丧偶者自杀率低于婚姻稳定者

C.高社会阶层者的自杀率最低

D.国外资料显示,在自杀死亡者中,男女性别比约为3:1

E.我国的农村自杀率低于城市

考点:天津住院医师精神科自杀自杀题库
题型:单项选择题

The Cambridge Science Festival Curiosity Challenge

Dare to Take the Curiosity Challenge!

The Cambridge Science Festival (CSF) is pleased to inform you of the sixth annual Curiosity Challenge. The challenge invites, even dares school students between the ages of 5 and 14 to create artwork or a piece of writing that shows their curiosity and how it inspires them to explore their world.

Students are being dared to draw a picture, write an article, take a photo or write a poem that shows what they are curious about. To enter the challenge, all artwork or pieces of writing should be sent to the Cambridge Science Festival, MIT Museum, 265 Mass Avenue. Cambridge 02139 by Friday, February 8th.

Students who enter the Curiosity Challenge and are selected as winners will be honored at a special ceremony during the CSF on Sunday, April 21st. Guest speaker will also present prizes to the students. Winning entries will be published in a book. Student entries will be exhibit and prizes will be given. Families of those who take part will be included in the celebration and brunch will be served.

Between March 10th and March 15th, each winner will be given the specifics of the closing ceremony and the Curiosity Challenge celebration. The program guidelines and other related information are available at: http://cambridgesciencefestival.org.

小题1:Who can take in the Curiosity Challenge?

A.School students.

B.Cambridge locals.

C.CSF winners.

D.MIT artists.小题2:When will the prize-giving ceremony be held?

A.On February 8th.

B.On March 10th

C.On March 15th..

D.On April 21st.小题3:What type of writing is this text?

A.An exhibition guide.

B.An art show review.

C.An announcement.

D.An official report.

题型:单项选择题

T淋巴细胞和B淋巴细胞发生免疫应答的免疫场所是()。

A.骨髓

B.周围免疫器官

C.中枢免疫器官

D.胸腺

E.淋巴结

题型:单项选择题

Windows系统安装时生成的Documents and Settings、Winnt和System32文件夹是不能随意更改的,因为它们是 (5) 。在Windows文件系统中, (6) 是一个合法的文件名; (7) 不是合法的可执行文件的扩展名。

A.exe

B.com

C.rar

D.bat

题型:单项选择题

在一定体积的密闭容器中,进行如下化学反应:CO2(g)+H2(g) CO(g)+H2O(g),其化学平衡常数K和温度t的关系如下表:

t℃70080083010001200
K0.60.91.01.72.6
回答下列问题:

(1)该反应的化学平衡常数表达式=                       

(2)该反应为           反应(选填吸热、放热)。

(3)能判断该反应是否达到化学平衡状态的依据是   (多选扣分)。

a.容器中压强不变            b.混合气体中 c(CO)不变

c.υ正(H2)=υ逆(H2O)    d.c(CO2)=c(CO)

(4)某温度下,平衡浓度符合下式:c(CO2)·c(H2)=c(CO)·c(H2O),试判断此时的温度为

              ℃。

题型:单项选择题

在正常条件下,随着埋深增加,地层的压实程度增加,孔隙体积减小,地层体积密度增大,地震波传播速度(),声波时差()。

A.加快;变大

B.加快;变小

C.减小;变大

D.减小;变小

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