下列哪一种因素是缺血-再灌注损伤发生的主要机制()。 A.钙超载 B.自由基作用 C

题型:单项选择题

问题:

下列哪一种因素是缺血-再灌注损伤发生的主要机制()。

A.钙超载

B.自由基作用

C.白细胞作用

D.高能磷酸化合物缺乏

E.无复流现象

考点:山东住院医师口腔整形科Ⅱ阶段专业理论专业理论题库
题型:单项选择题

某企业2014年6月销售厂房,取得收入14000万元,该厂房建造后最初入账原值8000万元,已提折4000万元。该企业上述业务应纳营业税为()万元。

A.200 

B.300 

C.325 

D.700

题型:单项选择题

阅读理解。

     British paychologists have found evidence of a link between excessive (过度的) Internet use and

depression, a research has shown.

     Leeds University researchers, writing in the Psychopathology journal, said a small part of Internet

users were classed as Internet addicts and that people in this group were more likely to be depressed

than non-addicted users.

     The article on the relationship between excessive Internet use and depression is from a

questionnaire-based study of 1,319 young people and adults.

     The respondents answered questions about how much time they spent on the Internet and what they

used it for; they also complete the Beck Depression Inventory---a series of questions designed to

measure the seriousness of depression.

     The six-page report,by the university's Institute of Psychological Science, said 18 of the people who

complete the questionnaire were Internet addict."Our research indicates that excessive Internet use is

associated with depression, but what we don't know is which comes first-are depressed people drawn

to the Internet or does the Internet cause depression?" the article's lead author Dr Catriona Morrison

said."What is clear is that, for a small part of people, excessive use of the Internet could be warning signal

for depressive tendencies."

     The age range of all respondents was between 16 and 51 years, with an average age of 21.24. The

average age of the 18 Internet addicts was 18.3 years. By comparing the levels of depression within this

group to that within a group of 18 non-addicted Internet users, researchers found the Internet addicts

had a higher chance of developing depression than non-addicts. They also discovered that addicts spent

more time visiting sexually pleasing website, online gaming sites and online communities.

     "The public speculation (推测) was further proved by this study. That's to say, over-engaging in

websites which serve to replace normal social function might be linked to psychological disorders like

depression and addiction," Morrison said."We now need to consider the wider social influence of this

relationship and clearly prove the effects of excessive Internet use on mental health."

1. Internet addicts are people who ______ according to the passage.

A. use the Internet more than enough     

B. feel depressed when using the Internet

C. seldom connect to the Internet        

D. feel depressed without the Internet

2. What is confirmed by the study according to the passage?

A. Depression leads to excessive use of Internet

B. Depression results from excessive use of Internet

C. Excessive use of internet usually accompanies depression

D. Excessive use of internet is usually earlier to depression

3. It is thought by the public that online communities______.

A. can never replace normal social function

B. are intended to replace normal social function

C. are associated with psychological disorders

D. shouldn't take the blame for psychological disorders

4. According to Dr Catriona Morrison, the public speculation________.

A. lacks scientific evidence      

B. helps clarify their study

C. finds a theoretical basis      

D. has little scientific value

题型:单项选择题

PDH的二次群8Mbit/s信号采用如下()容器装载。

A.C12

B.C2

C.C3

D.无对应容器

题型:单项选择题

IGBT的反向耐压较低,目前IGBT模块总是将二极管同IGBT()封装在一起。

A.并联

B.串联

C.反并联

D.以上选项都不正确

题型:单项选择题

菲利认为,犯罪饱和法则的主要表现之一是( )

A.犯罪数量的周期性变动

B.犯罪危害的周期性变动

C.犯罪结构的周期性变动

D.犯罪性质的周期性变动

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