已知集合M={x|x2＜4}，N={x|x2－2x－3＜0}，则集合M∩N等于（

某研究探讨氧疗对缓解妇科腹腔镜术后患者肩部疼痛的影响。研究方法是将腹腔镜术后第1天肩痛的患者随机分为试验组、对照组；对照组接受术后常规护理，试验组除常规护理外，8：00和16：00分别给予2h的吸氧。患者疼痛情况定时评分，比较两组患者肩痛情况的缓解程度。

符合此类研究应具备的条件除外（）

A.随机对照

B.操纵

C.样本量大

D.设立对照组

E.随机抽样

不会造成血沉加快的因素是（）

A.血沉管倾斜

B.室温高于25℃

C.标本有血凝块

D.标本溶血

E.测定管的内径比标准管小

阅读理解

     Age plays a major part in people who are infected with cold, ie, in people who suffer from cold

infection.A study done by University of Michigan, has shown information that seems to be true for

the general population.Babies are the most cold infected group, generally more than six colds in their

first year.Boys have more colds than girls up to the age of three.After three, girls are easier to get

infected with cold than boys, and teenage girls get three colds a year to boys' two.The general cold

infections continue to get less into adults.Elderly people who are in good health have as few as one

or two colds every year.One interesting thing is found among people in their twenties, especially

women, who show a rise in cold infection, because people in this age group are most likely to have

young children.

      The study has also found that economy plays an important role as well.With more and more

income, the frequency at which colds are reported in the family is getting lower and lower.Families

with the lowest income usually sufferabout a third ally forces people to live in rooms more crowded

than rooms owned by richer people, and the crowding usually leads to more chances for the cold

virus to travel from person to person.Low income may also have an effect on our diet.Many scientists

believe that a poorer diet usually leads into more possibilities of cold infection.

1. Which of the age groups has the highest frequency of cold infection?

A. Small babies.  

B. Teenage boys.

C. Adult women. 

D. Elderly people.

2. The purpose of writing this passage is to________.

A. give the readers some tips to avoid cold infection

B. show a carefullmade study on cold infection

C. report the major reasons leading to cold infection

D. describe all the possible dangers of cold infection

3. How does economy play an important role in cold infection?

A. Families with lower income suffer less from cold infection.

B. People who have lower income enjoy living in crowded rooms.

C. Rich families can have better nutrition and never get infected.

D. People with higher income have fewer chances of infection.

4. From the passage we can infer that________.

A. age is the only important factor that connects with colds

B. families with the highest income will more easily get infected

C. people have lower frequency of infection as they grow older

D. a better diet may help people to fight against cold infection

在FIDIC合同条件下，承包商应提交( )，说明根据合同应完成的所有工作的价值和承包商认为根据合同或其他规定应支付给他的任何其他款额。

A．竣工报表

B．最终报表和结清单

C．最终付款证书

D．履约证书

白喉的临床类型为（）

A.鼻白喉

B.咽白喉

C.气管白喉

D.喉白喉

E.其他部位白喉