问题 选择题

当手臂弯曲,将一个铅球顶在肩上时,你的肱二头肌和肱三头肌所处的状态是(  )

A.肱二头肌舒张、肱三头肌收缩

B.肱二头肌收缩、肱三头肌舒张

C.肱二头肌和肱三头肌都收缩

D.肱二头肌和肱三头肌都舒张

答案

骨骼肌只能收缩牵拉骨而不能将骨推开,因此一个动作的完成总是由两组肌肉相互配合活动,共同完成的.例如屈肘动作和伸肘动作的产生.屈肘时,肱二头肌收缩,肱三头肌舒张,伸肘时,肱三头肌收缩,肱二头肌舒张.双臂自然下垂,肱二头肌和肱三头肌都舒张;双手竖直向上提起重物或双手抓住单杠身体自然下垂时,肱二头肌和肱三头肌都收缩.铅球运动员手握铅球放在肩上准备投掷时,属于屈肘动作,此时肱二头肌收缩,肱三头肌舒张.

故选:B

改错题
下列句子中各有一处错误,请找出。
( )1. They need much things.                                 
              A      B     C     D                                        
( )2. They are twin brothers, but they are in different look.
                    A                         B              C                D                   
( )3. That girl is a friend of my.                          
             A          B      C          D                                    
( )4. Could you please to tell me your name?                
                           A         B     C    D                                   
( )5. Who can help she? She is in poor English.             
             A           B     C                    D                               
( )6. My brother works in hospital. He is a good doctor.    
                               A             B           C      D                              
( )7. Her family are very big.                              
             A    B       C          D                                  
( )8. —What would you like drinking?                      
                 A                   B        C                               
           —Some orange.                                      
                  D                                               
_________
         
_________
          
_________
       
_________ 
      
_________ 
        
_________
         
_________
         
_________

单项选择题

When I first entered university, my aunt, who is an English professor, gave me a new English dictionary. I was (16) to see that it was an English-English dictionary, also known as a monolin-gual dictionary. (17) it was a dictionary intended for non—native learners, none of my classmates had one (18) , to be honest, I found it extremely (19) to use at first. I would look up words in the dictionary and (20) not fully understand the meaning, I was used to the (21) bilingual dic-tionaries, in which the words are (22) both in English and Chinese, I really wondered why my aunt (23) to make things so difficult for me. Now, after studying English at university for three years, I (24) that monolingual dictionaries are (25) in learning a foreign language.

As I found out, there is (26) often NO perfect equivalence(对应) between two (27) in two language. My aunt even goes so far as to (28) that a Chinese "equivalent" can never give you the (29) meaning of a word in English! (30) , she insisted that I read the definition(定义) of a word in a monolingual dictionary (31) I wanted to get a better understanding of its meaning. (32) , I have come to see what she meant.

Using a monolingual dictionary for learners has helped me in another important way. This dictionary uses a(n) (33) number of words, around 2,000, in its definitions. When I read these definitions, I am (34) exposed to (接触)the basic words and learn how they are used to explain objects and ideas. (35) this, I can express myself more easily in English.

32()

A. Largely

B. Generally

C. Gradually

D. Probably