搜题请搜索小程序“爱下问搜题”
问题 单项选择题

临床复查白细胞计数，评价其准确性的考核方法是（）

A.变异百分率评价法

B.两差比值评价法

C.双份计数标准差评价法

D.重复计数标准差评价法

E.常规考核标准

答案

参考答案：B

解析：

白细胞计数的考核方法包括：常规考核标准、变异百分数评价法、两差比值评价法和双份技术标准平价法。两差比值评价法是同一标本在短时间内重复2次测定之差与2次细胞计数标准差的比值，其准确性高。

【考点】：白细胞计数的质量控制

完形填空
阅读下面的材料,掌握其大意,然后从短文后各题所给的A、B、C、D四个选项中,选择最佳选项。    

     Shanghai is a modern city. It likes new things. Shanghai was a(n)   1   city even a hundred years ago,
so there is a(n)   2   -if Shanghai likes new things, what should it do with the old things?    
     The government (政府) thinks a modern city should have both old and new things. The Waibaidu
Bridge is an example. People built it over one hundred years ago. When it   3   , the government decided
to spend a lot of money rebuilding (重建) it. The government did this   4   it believes that the city needs to
remember its history.    
     There are also some people working to save historical (历史的) things. Mr Wang is one of   5   .
When he was fifty years old, he   6   from Canada to Shanghai, his hometown, and started to collect
materials (材料) of old houses. He believed that old houses were a(n)   7   part of China's history so he
tried his best to save them. He   8   the materials to other places and rebuilt them.    
     You can also help to remember the past. Get a camera and take   9   of old things. Ask old people to
tell you stories about Shanghai's  10   . It can be fun and you can see how some new things in the past are
old now.

( )1. A.small
( )2. A.mistake
( )3. A.fell down
( )4. A.if    
( )5. A.us    
( )6. A.walked  
( )7. A.light
( )8. A.reported  
( )9. A.dreams  
( )10. A.past  		B.big       
B.question     
B.made up     
B.though   
B.him      
B.returned             
B.underground    
B.provided   
B.photos      
B.attitude 		C.peaceful
C.plan  
C.caught up
C.so     
C.them                     
C.swam  
C.difficult
C.took  
C.notes
C.tomorrow		D.tiring              
D.answer              
D.gave up             
D.because             
D.you                 
D.wrote               
D.important           
D.considered          
D.conclusions         
D.present          
查看答案
单项选择题

遥控台主/备DTR100RF输出口连接的射频组件是（）。

A.发射天线

B.同轴继电器

C.隔离器

D.腔体滤波器
查看答案