问题
单项选择题
转移性肝癌最常见的CT强化类型是（）
A.充填式强化
B.环形强化
C.不强化
D.明显均匀强化
E.包膜征
答案
参考答案：B
解析：转移性肝癌的环形强化：肿瘤中央见无增强的低密度，边缘强化呈高密度，外周有一稍低于肝密度的水肿带，构成所谓"牛眼征"。
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转移性肝癌最常见的CT强化类型是（）
A.充填式强化
B.环形强化
C.不强化
D.明显均匀强化
E.包膜征
参考答案：B
解析：转移性肝癌的环形强化：肿瘤中央见无增强的低密度，边缘强化呈高密度，外周有一稍低于肝密度的水肿带，构成所谓"牛眼征"。
One day, when I was in high school, I saw a kid named Kyle from my class walking home from school with all his books, I thought to myself, “__26___ would anyone bring home all his books for the weekend? He must really be 27___.”As I was walking, I saw several kids running toward him. They ran at him, 28 all his books out of his arms and he fell down in the dirt, His glasses went 29 and landed in the grass. My 30 went out to him. So, I ran over to him. 31 I handed him his glasses, he looked at me and said, “Hey, thanks!” I helped him pick up his books, and asked him where he lived. As it 32 , he lived near me. We talked all the way home. Over the next four years, Kyle and I became best friends. Kyle was the 33 __student of our class, one of those guys that really found themselves during high school. Therefore he had the 34 to prepare a 35 speech. On the graduation day, I could see that he was 36 .So, I patted him on the back and said, “Hey, big guy, you’ll be 37 !” He looked at me and smiled. He cleared his throat, and began. “Graduation is a time to 38 those who helped you make it through those 39 years. Your parents, your teachers… but mostly your friends, I am here to tell all of you that being a friend to someone is the best 40 you can give him.” I just looked at my friend with 41 as he told the story of the first day we met. He had planned to 42 himself over the weekend and was carrying his books home. “Thankfully, nothing happened. My friend 43 me from doing the unspeakable.” Not until that moment did I realize that you should never underestimate(低估) the 44 of your actions. With one small gesture you can 45 a person’s life. For better or for worse.
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