问题 单项选择题

在正态分布中心向左或向右移动1.50-情况下,西格玛水平Z为3时,其特性落在规范限内的百分比是()。

A、30.23%

B、69.13%

C、93.32%

D、99.379%

答案

参考答案:C

完形填空
完形填空。
     I went back to China as soon as school was over at the end of June from Canada. It's    1    to go back
to China this summer because of the A (H1N1) flu. Everybody seemed to be    2   . The easiest thing for us
to do was to wear masks (口罩) on the plane, as my mom suggested. However, it was not    3   to wear a
mask for ten hours. I decided to put the masks into my bag    4   wearing them.
     Everything seemed OK    5   the flight. I saw only five people wear masks all the time. When we arrived
in Beijing, some    6    came into the plane and took our temperature. Fortunately,    7   had a fever. Therefore,
I was able to get home on time.
     However, everything went wrong after I got home. I became sick, with a sore throat and a fever because
I had not    8    my mom's words. Luckily, I just had a common    9  . While I was sick in bed, I thought that
if I had listened to my mom at first, I   10   would have never caught the cold. It's always wise to listen to
your mom's suggestions.
( )1. A. difficult   
( )2. A. happy      
( )3. A. necessary   
( )4. A. thanks for   
( )5. A. before      
( )6. A. policemen  
( )7. A. somebody    
( )8. A. followed   
( )9. A. stomachache 
( )10. A. differently 
B. impossible   
B. nervous      
B. healthy     
B. instead of  
B. by        
B. doctors          
B. anybody    
B. heard     
B. toothache   
B. particularly
C. easy       
C. excited    
C. unfair      
C. because of  
C. after      
C. engineers      
C. nobody       
C. known       
C. cold       
C. usually   
D. important     
D. sad           
D. comfortable   
D. except for    
D. during                             
D. reporters     
D. everybody     
D. understood    
D. headache    
D. probably    
单项选择题