后方回声增强_爱下问搜题

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问题名词解释

后方回声增强

答案

参考答案：是由于囊液的衰减系数远低于肝实质，而距离增益补偿（DCG）作用的结果。利用后方回声增强，通常可以鉴别液性与实性病变。如肝囊肿时其后方组织回声增强。

完形填空

阅读下面的短文，从短文后各题所给的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
A teacher teaching maths to seven-year-old Laiq asked him, “If I give you one apple and one apple and one apple, how many apples will you have?”
Within a few seconds, Laiq      confidently, “Four!”
The confused teacher was expecting a(n)       correct answer, three. She was disappointed. “Maybe the child did not listen      ” she thought. She     “Laiq, listen carefully. If I give you one apple and one apple and one apple, how many apples will you have?”
Laiq had seen the      on his teacher’s face. He     again on his fingers. But within him he was also      the answer that would make the teacher happy. This time hesitatingly he replied, “Four.”
The disappointment stayed on the teacher’s face. Suddenly she    that Laiq liked strawberries. She thought maybe he didn’t like apples and that was why he couldn’t answer the question. This time with an excitement in her     she asked, “If I give you one strawberry and one strawberry and one strawberry, then how many you will have?”
Seeing the teacher   , young Laiq calculated on his fingers again. There was no pressure on him. But a little on the teacher. She wanted her new    to succeed.   a hesitating smile young Laiq replied, “Three?”
The teacher now had a      smile. Her approach had succeeded. She wanted to      herself. But one last thing remained.      she asked him, “Now if I give you one apple and one apple and one more apple how many will you have?”
Confidently Laiq answered, “Four!” The teacher was     , “How Laiq, how?” she demanded in a little impatient voice.
In a voice that was      and hesitating young Laiq replied, “Because I already have one     in my bag.”
The story tells us:      someone gives you an answer that is      from what you expect, don’t think they are wrong. There shall be an angle that you may not have thought about yet.

C．attentively

A．satisfaction

B．disappointment

D．determination

A．searching for

B．waiting for

C．arguing about

D．talking about

B．congratulate

问答题简答题

为什么屈服点作为钢材性能最好标准？