问题 单项选择题

以下对探头的说法正确的是()

A.脉冲回声式探头可分为单探头、机械探头和电子探头

B.单探头由圆形单晶片组成

C.电子探头采用多元阵结构

D.机械探头利用机械方式使声束进行扫查

E.以上均是

答案

参考答案:E

阅读理解

阅读理解

     When I was about 12, I had an enemy, a girl who liked to point out my shortcomings(缺点). Week by week her list grew: I was very thin, I was not a good student, I talked too much, I was too proud, and so

on. I tried to bear all this as long as I could. At last, I became very angry. I ran to my father with tears in

my eyes.                                                                

     He listened to me quietly, and then he asked. "Are the things she says true or not? Janet, didn't you

ever wonder what you're really like? Well, you now have that girl's opinion. Go and make a list of

everything she said and mark the points that are true. Pay no attention to the other things she

said."                                                                          

     I did as he told me. To my great surprise, I discovered that about half the things were true. Some of them I couldn't change (like being very thin), but a good number I could-and suddenly I wanted to change.

For the first time I went to a fairly clear picture of myself.            

     I brought the list back to Daddy. He refused to take it. "That's just for you," he said. "You know better than anyone else the truth about yourself. But you have to learn to listen, not just close your ears in anger

and feeling hurt. When something said about you is true, you'll find it will be of help to you. Our world is

full of people who think they know your duty. Don't shut your ears. Listen to them all, but hear the truth

and do what you know is the right thing to do."                    

     Daddy's advice has returned to me at many important moments. In my life, I've never had a better piece of advice.                                                          

1. What did the father do after he had heard his daughter's complaint?                    

A. He told her not to pay any attention to what her "enemy" had said and just do what she want to

     do.                    

B. He criticized (批评) her and told her to overcome her shortcomings.                  

C. He told her to write down all her "enemy" had said and pay attention only to the things that were

     true.                                                      

D. He refused to take the list and want to have a look at it.                                  

2. What does "Week by week her list grew" mean?                                   

A. She made a list of my shortcomings and kept on adding new ones so it was growing longer and longer.  

B. Week by week she discovered more shortcomings of mine and pointed them out to

     me.                                                

C. I was having more and more shortcomings as time went on.                        

D. Week by week, my shortcomings grew more serious.                          

3. Why did her father listen to her quietly?                                          

A. Because he believed that what her daughter's "enemy" said was mostly true.          

B. Because he had been so angry with her daughter and wanted to keep

     silent.                                                 

C. Because he knew that his daughter would not listen to him at that moment.            

D. Because he was not quite sure which girl was telling the truths.                        

4. Which do you think would be the best title for this passage?                          

A. Not an Enemy, but the Best Friend              

B. The Best Advice I've Ever Had                                              

C. My Father                                  

D. My Childhood

单项选择题