问题 单项选择题 B型题

可引起呼吸性酸中毒合并代谢性酸中毒的是()

A.应用强心药物

B.慢性呼吸衰竭合并休克

C.应用大量利尿剂

D.呼吸道感染加重

E.机械通气过度

答案

参考答案:B

解析:该题为临床实践与理论知识结合分析题。利尿剂以噻嗪类和袢类利尿剂为主,利尿剂应用后造成细胞外液减少,HCO-3从近端肾小管重吸收增多可以造成碱血症;另外由于利尿剂应用后导致K+丢失,后者刺激氨的合成,也同时可使HCO-3形成增加;细胞外液量减少以及随之而产生的醛固酮分泌过多使H+从远端肾小管分泌过多,后者加促HCO-3生成,亦可引起代谢性碱中毒。

完形填空
完形填空。
     As soon as he finished his homework. Eric jumped onto his bicycle and rode off in the direction of the
beach. While he was  1  along. He thought about the whales (鲸鱼). He hoped he would see them again
today. After he got to the beach. Eric  2  his bicycle behind a bush so that no one could see it from the
road. Then he ran down onto the sand.  3  it was only four in the afternoon,the sky was already growing
dark. Eric frowned (皱眉). If it  4  he wouldn't be able to see the whales because they would stay in deeper
water. He hurried along the beach  5  the rocks. They were the best place to watch the whales from
because of their  6  . Before Eric reached the rocks he felt a drop of water on his head. "Oh, no!" he thought.
"Now the whales will stay in the deep water and I won't be able to  7  them!" But just then he saw a large
shape on the beach. It was a young whale! The whale had come too close to the shore (海岸) and got stuck
(搁浅) on the  8 ! At first the whale didn't move at all and Eric thought it was  9  . Then he saw its tail
move weakly. Eric turned and ran through the rain as fast as he could back to his bicycle. He had to get
  10 ! Unless they got the whale back in the water soon,it would die and Eric couldn't let that happen.
( )1. A. riding
( )2. A. sent  
( )3. A. As    
( )4. A. shone 
( )5. A. into  
( )6. A. length
( )7. A. watch 
( )8. A. soil  
( )9. A. dead  
( )10. A. care 
B. running
B  hid    
B. Since  
B. snowed 
B. off    
B. size   
B. kill   
B. beach  
B. pretty 
B. water  
C. getting 
C. look    
C. Because 
C. rained  
C. to      
C. height  
C. catch   
C. grass   
C. lovely  
C. medicine
D. walking
D. got    
D. Although
D. blew   
D. from   
D  shape  
D. save   
D. water  
D  alive  
D. help           
单项选择题