问题
单项选择题
缺血性心脏病二尖瓣关闭不全的主要病理改变是
A．瓣环扩大
B．瓣叶穿孔
C． * * 肌功能失调或断裂
D．左室扩大
E．腱索延长
答案
参考答案：C
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缺血性心脏病二尖瓣关闭不全的主要病理改变是
A．瓣环扩大
B．瓣叶穿孔
C． * * 肌功能失调或断裂
D．左室扩大
E．腱索延长
参考答案：C
What do you do on the weekend ? Some people like to 1 at home, but others like to go 2 a walk or play football. My friends Jack works hard in a factory during the 3 . On the weekend, he always 4 the same things. On Saturday he 5 his car and on 6 he goes with his family to a village by car. His uncle and aunt have a farm there. It isn’t a 7 one, but there’s always 8 to do on a farm. The children help with the animals and give them their 9 . Jack and his wife help in the fields . At the end of the day, they are all 10 and Jack’s aunt gives them a big meal.
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