问题
单项选择题
M型超声的二尖瓣水平波群不能观察哪项M型曲线（）
A.室间隔
B.左室后壁
C.主动脉瓣
D.右室前壁
E.二尖瓣前壁
答案
参考答案：C
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M型超声的二尖瓣水平波群不能观察哪项M型曲线（）
A.室间隔
B.左室后壁
C.主动脉瓣
D.右室前壁
E.二尖瓣前壁
参考答案：C
Sumo wrestlers (相扑选手) are usually big, heavy men．The biggest sumo wrestler of all the time is Konishiki, who now 26 about 230 kg．Born in Hawaii, he was 27  a big boy．When he was a teenager, some people 28 he go to Japan and become a sumo wrestler．Although he took their advice, at first it was a 29 life．“I had to clean the toilets and 30 the rubbish,” Konishiki remembered, “I knew I had to 31 to the life in Japan．I said to myself, ‘I 32 learn Japanese.’ Soon I could 33 it quite well.” Konishiki’s career started 34 , and he was soon upgraded to a higher rank．But despite his 35 he soon had health problems．The doctors t  old him that he should 36 some weight．“I started dieting．I 37 to do it．But I did it too 38 ,” he said, “I lost some of my strength, too.” He lost a lot of fights, and then his parents got 39 in a car crash．“I must go and 40 them,” he thought．Though it was only three days 41 a big tournament (锦标赛), he flew back to Hawaii．Although he was quite 42 , they were not badly injured． When he returned, he knew that he had to do well．The newspapers said, “Konishiki must win, 43 he will go down in rank.”  Though he had many problems, Konishiki won 14 of his 15 fights, and won the Emperor’s Cup．He was so 44 that he cried．“You ought not to show your feelings,” he said, “but I couldn’t 45 it.”
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