牵引缓冲装置的（）、（）及（）在很大程度上，影响列车运行的纵向平稳性。

— How tall are you?

— I'm 1.7 ____ tall.        [ ]

A. metre    

B. metres    

C. years

幼儿急疹发热至出疹时间（）

A.发热3～4天出疹

B.发热4～5天出疹

C.发热1周出疹

D.发热1～2天出疹

E.热退后出疹

规划研究的内容一般有发展目标研究、发展思路和开发方案研究、（）、产业结构和产业政策研究、投资方案和备选项目研究等几个方面。

A.发展规划应遵循的原则、法规、依据等研究

B.规划条件研究

C.经济基础和社会环境研究

D.资源特点和优势、劣势研究

C

Conjoined twins lead separate but active lives.

Lori and Reba have never been alone and they want to keep it that way.

The 40-year-old conjoined twins in Pennsylvania,US,have read about others locked together by an accident of birth who have been medically separated.But they insist only death can part them.

“We’ve never imagined a life divided,”Lori said.

Lori and Reba are joined together at the side of their heads,facing in opposite directions.Their blood supply is partly linked,but each has a separate brain.

Reba suffers from a disease which has left her completely dependent on her sister.

Lori wheels her everywhere they go in different professional directions.Lori worked in a laundry room at a hospital for six years before giving that up to allow Reba to try to become a country singer.

Her first song is called “The Fear of Being Alone”,which was inspired by Reba and Lori’s desire for togetherness.

Reba’s career has taken her across the United States,Europe and parts of Asia.

While the twins receive some money from the government,the earning from Reba’s concerts go to AIDS and cancer charities(慈善机构).

The sisters have set goals for themselves.Reba looks forward to a successful career as a country singer,while Lori says she hopes to get married and have children.Lori said,”So when it comes,it comes.Meanwhile,I live wonderfully from day to day.”

46.When Lori said “We’ve never imagined a life divided”,she meant that      .

A.they don’t wish to be made separate        

B.they think their case is beyond medical help

C.independent life would be too good to think of 

D.they would die once separated

47.By leading separate lives,the topic means that       .

A.either of the two can look after herself   B.the twins do different things

C.they face in opposite directions         D.they are no longer conjoined now

48.When Reba gives performances as a country singer,Lori       .

A.works in a hospital                   B.continues her college education

C.brings up her children      D.looks after her sister

49.The twins lead active lives because they       .

A.are tired of staying at home doing nothing 

B.need more money  

C.want to prove themselves as useful citizens

D.have to earn their own bread

50.From the last paragraph we can understand that Lori       .

A.thinks it’s too late for her to have children 

B.is sure she’ll get married and have children

C.prefers to have things go naturally     

D.would rather not change her way of life

理想心肌损伤标志物的特性包括（）

A.标志物具有较高的敏感性和特异性

B.能检测早期心肌损伤，且窗口期长

C.根据心肌损伤标志物既可确诊AMI

D.能估计梗死范围大小，判断预后

E.以上都是