问题 单项选择题

在骨髓涂片检查中,下列指标通常在低倍镜下观察的是()

A.骨髓细胞分类

B.粒红比值

C.血细胞形态变化

D.巨核细胞计数

E.片尾肿瘤细胞观察

答案

参考答案:D

解析:骨髓细胞学检查通常需进行低倍镜和高倍镜观察,低倍镜下观察内容包括骨髓涂片的质量、判断骨髓增生程度、巨核细胞计数并分类、全片观察有无体积较大或成堆分布的异常细胞;高倍镜主要观察各系统细胞的增生程度,所占比例以及形态变化等。

填空题
阅读理解

阅读理解。

     Astronauts on shorter shuttle missions(使命)often work very long days.  Tasks are scheduled so tightly that break times are often used to finish the day's work.  This type of schedule is far too demanding for

long missions on the International  Space Station(ISS).  ISS crewmembers usually live in space for at

least a quarter of a year. They work five days on and two days off to mimic the normal way they do things on Earth as much as possible . Weekends give the crew valuable.  Weekends give the crew valuable time

to rest and do a few hours of  housework.  They can communicate with family and friends by email ,

internet phone and through

Private video conferees.

    While astronauts cannot go to a baseball game or a movie in orbit, there are many familiar active tics

that they can still enjoy . Before a mission.  The family and friends of each ISS crewmember put together

a collection of family photos, messages, videos and reading material for

The astronauts to look at when they will be floating 370 kilometers above the Earth.  During their mission,

the crew also receives care packages with CDs, books, magazines, photos and letters . And as from early 2010, the internet became available on the ISS , giving astronauts the chance to do some "web surfing (冲浪)"in  their personal time.  Besides relaxing with these more common entertainments, astronauts can

simply enjoy the experience of living in space.

    Many astronauts say that one of the most relaxing things to do in space is to look out the window and

stare at the universe and the Earth's vast land mass and oceans.

1. What does the word "minic"in Paragraph 1 probably mean?

A. Find              

B. Copy            

C. Change              

D. Lose

2.  Which of the following best describes the families of the astroauts on the ISS ?

A.  The are caring and thoughtful  

B.  The are  impatient and annoyed

C.  The are impatient and ammoyed.   

D.  The are excited and curious.

3.  In the final paragraph, the author shows that astronauts         

A. get more pleasure in space than on the Earth  

B.  find living in space a bit boring and tiring

C.  regard space life as common

D.  love to see the Earth from space

4.  The passage mainly discusses how astronauts         

A. work for longer missions in space  

B. connect with people on the Earth

C. observe the Earth from space

D. spend their free time in space