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问题 单项选择题

诊断成年女性贫血的标准为血红蛋白浓度低于（）

A.95g/L

B.105g/L

C.90g/L

D.120g/L

E.100g/L

答案

参考答案：D

解析：本题涉及的考点有贫血参考值的男、女、孕的标准分别是低于130、120、110g/L。

填空题

探究实验展示了化学的无穷魅力。以下是某兴趣小组的探究过程：

提出问题：小亮想探究分子的运动速率与相对分子质量的关系。

假设猜想：①分子质量（相对分子质量）越大，分子运动速率越快；②分子质量（相对分子质量）越小，分子运动速率越快。

查阅资料：已知浓氨水能挥发出氨气，浓盐酸能挥发出氯化氢气体，二者接触反应会产生白烟（即氯化铵固体）。

设计实验：如图所示，在玻璃管两端分别放入蘸有浓氨水和浓盐酸的棉花团。

实验现象：C处产生的白烟较多。

解释与结论：（1）氨分子的相对分子质量      （填“大于”、“等于”或“小于”）氯化氢分子的相对分子质量，由此可知，相对分子质量越大，分子的速率越      （填“快”或“慢”）。

（2）反应的化学方程式为                          。

拓展探究：完成上述实验后，小静还想研究分子运动速率与温度的关系。他将等量的品红分别滴入到等量的热水和冷水中，其实验现象如下所示．

实验过程冷水热水
开始红色扩散较慢红色扩散较快
长久放置最终均成为红色、均匀、透明的液体
 

依据此实验现象，得出的结论是                                   。
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完形填空。
     I can still remember when I met my best friend. She had just moved into the neighborhood and her
grandmother brought her down to    1   me. I hid behind my mother and she hid behind her
grandmother,   2    to look at each other. Soon we lost the   3   and started playing with each other.
In the 7th grade, I first lost touch with her. She was    4   family problems and I deserted her to be with
the   5   people. None of my new friends liked her as much as I did because they knew she had   6  .
However, every summer we   7    always sit at each other's house, watch soap operas, and talk about
all the boys we liked.
It was last year when I noticed the problem. I guess I was   8   devoted in high school to   9    she
needed someone there. Anyway, she made a new best friend and so did I. Then I didn't know why,
   10   she started cutting herself!
     She then was diagnosed(诊断)with clinical depression. At first, I was very     11  , but we still stayed
in    12    I wanted to be there with her since her new best friend basically   13    her and people were
calling her    14  .
     Yesterday she came to me and said, "I never knew what a best friend was    15    you, the only person,
would stop me cutting. I   16     your help so much, and you didn't even know you were    17    me."
We both cried. And I guess a kind of    18    from my life so far is never to give up on your friends. Even
if they aren't as cool as others, or people think they are crazy, they need    19    there. If you desert them,
you will only be   20    yourself.
( )1. A. follow  
( )2. A. scared    
( )3. A. temper    
( )4. A. taking up  
( )5. A. happier  
( )6. A. problems  
( )7. A. should  
( )8. A. much      
( )9. A. admit    
( )10. A. but     
( )11. A. calm     
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( )13. A. confused  
( )14. A. crazy  
( )15. A. unless  
( )16. A. expect  
( )17. A. urging  
( )18. A. honour  
( )19. A. someone  
( )20. A. innocent  		B. meet        
B. annoyed        
B. interest      
B. getting through
B. cooler        
B. shortcomings  
B. could          
B. too            
B. accept        
B. for            
B. considerate    
B. touch          
B. bothered      
B. stubborn      
B. as            
B. influence      
B. blaming        
B. favour        
B. something      
B. successful     		C. join       
C. worried      
C. confidence    
C. going through  
C. stronger      
C. partners      
C. would        
C. only          
C. consider      
C. or           
C. upset        
C. control      
C. reminded      
C. clumsy        
C. until        
C. appreciate    
C. helping      
C. pleasure      
C. anyone        
C. guilty        		D. support        
D. delighted      
D. shyness        
D. making up    
D. cleverer      
D. disabilities  
D. might          
D. just          
D. realize        
D. so            
D. helpful        
D. mood          
D. deserted      
D. stupid        
D. that          
D. demand        
D. hurting        
D. lesson        
D. everything    
D. reliable      
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