问题 单项选择题

丈夫的哥哥患有半乳糖血病(一种常染色体隐性遗传病),妻子的外祖母也有此病,家庭的其他成员均无此病。经调查,妻子的父亲可以视为基因型纯合。可以预测,这对夫妻的儿子患半乳糖血病的概率是()

A.1/12

B.1/4

C.3/8

D.1/2

答案

参考答案:A

完形填空
完形填空。
     In most parts of the world, many students help their schools make less pollution. They join " 1 ". In a
meaningful club, people work together  2   our environment clean.   
     Here are some things students often do.   
     No-garbage (废料,垃圾) lunches. How much do you throw away  3  lunch? Environment clubs ask
students to bring heir lunches in bags that can  4  again. Every week, they will choose the classes that makes
the least garbage and report them to the whole school.   
     No-car day. On a no-car day,  5  comes to school in a car. Neither the students nor the teachers! Cars
give pollution to the air.  6  remember: walk, jump, bike or run. Use your legs! It's lots of fun.   
      7  the water! Did you know that some toilets could  8  twenty to forty cubic (立方的) meters of water
an hour? In a year, to your  9 , that would fill a small river! In environment clubs, students repair those
broken toilets  10 .   
    We love our environment. Let's work together and make it clean.
( )1. A. no-car day
( )2. A. make      
( )3. A. since     
( )4. A. use       
( )5. A. somebody  
( )6. A. So        
( )7. A. Turn on   
( )8. A. waste     
( )9. A. surprise  
( )10. A. their    
B. environment club
B. making          
B. until           
B. be used         
B. anybody         
B. And             
B. Turn up         
B. give            
B. surprised       
B. they            
C. new music groups
C. to make         
C. before          
C. throw           
C. everybody       
C. But             
C. Turn off        
C. keep            
C. surprising      
C. them            
D. no-garbage lunches
D. will make        
D. after            
D. be thrown        
D. nobody                                  
D. Or               
D. Turn down        
D. throw            
D. surprisingly     
D. themselves       
单项选择题