问题
多项选择题
二尖瓣狭窄的M型超声心动图变化为（）
A.二尖瓣前后叶呈同向运动，其特异性强
B.二尖瓣曲线增厚，回声增强
C.二尖瓣前叶EF斜率降低
D.左心房扩大，合并心房纤颤者可见左房附壁血栓
E.二尖瓣前叶呈城墙样改变
答案
参考答案：A, B, C, D, E
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二尖瓣狭窄的M型超声心动图变化为（）
A.二尖瓣前后叶呈同向运动，其特异性强
B.二尖瓣曲线增厚，回声增强
C.二尖瓣前叶EF斜率降低
D.左心房扩大，合并心房纤颤者可见左房附壁血栓
E.二尖瓣前叶呈城墙样改变
参考答案：A, B, C, D, E
I watched quietly as my little brother was caught in the act. He sat in the corner of the living room, a 1 in one hand and my father's new book in the other. 2 my father walked into the room, my brother cowered (畏缩) slowly. He sensed that he had done something 3 . From a distance I could see that he had 4 my father's new book and scribbled (乱画) in it. Now, looking at my father in 5 , he and I both waited for his punishment. My father 6 up his prized book, looked at it carefully, and then sat down, without saying a word. Books were 7 to him. He was a clergyman（牧师） and for him, books were 8 .What he did next was unbelievable. Instead of 9 my brother, he sat down, took the pen from 10 , and then wrote in the book himself, alongside the scribbles John had made: John s work, 1959, age 2. How many times have I looked into your beautiful face and into your warm, alert (警觉的) eyes looking up at me? And how many times have I 11 God for the one who has now scribbled in my new book? "Wow," I thought, "This is punishment?" The years and the books came and went. Our family experienced what all families go through and perhaps a little bit more: happiness and 12 , laughter and tears. We always knew our parents 13 us and that one of the proofs (证明) of their love was the book. From time to time we would 14 it, look at the scribbles, read my father's expression of love, and feel 15 .
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