进行人群高血压普查时应选择的疾病频率测量指标是() A.发病率 B.发病专率 C.罹

题型:单项选择题

问题:

进行人群高血压普查时应选择的疾病频率测量指标是()

A.发病率

B.发病专率

C.罹患率

D.时点患病率

E.期间患病率

考点:预防医学科住院医师预防医学科预防医学科题库
题型:单项选择题
正负电子对撞后湮灭生成两个频率相同的光子.已知普朗克常数为h,电子质量为m,电磁波在真空中的速度为c,在折射率为4/3的水中,这种频率的光波长为(  )

A.3h/4mc

B.4h/3mc

C.h/mc

D.mc/h

题型:单项选择题

OK, I admit it: emoticons (表情符号) are popular. Some people even think they are fun. Many seem unable to get through an e-mail or Instant Message chat sentence without using one. Some feel that they add feeling and character to otherwise cold digital communications.

Some, however, such as editor and Hollywood scriptwriter John Blumenthal, blast (抨击) the use of emoticons as “infantile (幼稚的) just like the people who use them”  He believes that words themselves should be enough. “If you’re being funny, happy or sad, that should be apparent (明显的) from the comment that goes before the emoticon,” he argues.

In the eyes of Blumenthal, the use of emoticons is a gender issue. “Men don’t use emoticons very much. Maybe not at all,” he said. “Teenage girls and women seem to use them a lot. Maybe there’ s an emoticon gene.”

It’s an interesting opinion, but it is not shared by all.

In an interview with The New York Times, Dacher Keltner, professor of psychology at the University of California, said that emoticons are popular because our brains are programmed “to seek out representations of humanity”. He believes that they appeal not because they are shortcuts for the lazy, but because they tap into (融入) something beyond language. They reach to our need to be with and communicate with people.

All of these arguments may be somehow valid (正确的). Each one of us will choose to communicate in our own way. I do not have much time for emoticons. I tried to use one once and felt like I was stealing into a primary school class that I had no place being in. I’d rather let my words do the talking.

Friends, however, send me messages and e-mails full of emoticons. I have no problem with this. I don’t regard any of my friends as lazy or immature (不成熟的). It’s just a question of individuality. :)

小题1:According to the article, emoticons are popular because ______. 

A.most of them look funny

B.they are easy for lazy people to use

C.they add feeling and character to a communication

D.a reader cannot understand a message without them小题2:Which of the following views would John Blumenthal agree with?  

A.Instant Message chatters are childish.

B.It’s enough to use language in digital communication.

C.Men never use emoticons.

D.There is an emoticon gene in everybody.小题3:From the text, we can conclude that the author ______. 

A.feels he has no difficulty using emoticons

B.thinks emoticons don’t suit him

C.encourage his friends to use emoticons

D.believes that emoticons are suitable for everyone小题4:What is the main point of the article? 

A.Advice on language used over the Internet.

B.The history of emoticons.

C.Arguments over the use of emoticons.

D.Reasons for the popularity of emoticons.

题型:单项选择题

公文的行文规定主要包括三个方面的内容,其完整表述是()

A.行文关系、行文方向、行文方式

B.行文方向、行文方式、行文规则

C.行文关系、行文方向与方式、行文规则

D.行文关系、行文方向

题型:单项选择题

关于骨髓不正确的叙述是()。

A.骨髓是出生后唯一产生红细胞、粒细胞和血小板的场所

B.红骨髓是有活跃造血功能的骨髓

C.黄骨髓是无功能的脂肪化的骨髓

D.红骨髓可转变为黄骨髓,黄骨髓不能转变为红骨髓

E.胚胎期的造血可分为中胚叶造血期、肝脏造血期和骨髓造血期

题型:单项选择题

起重机能吊起的重物或物料连同可分吊具或属具质量的总和称为______。

A.有效起重量
B.总起重量
C.额定起重量
D.起重量

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