问题
单项选择题 B型题
二尖瓣后叶关闭不全（）。
A.颈部和锁骨上窝
B.左腋下和肩胛下区
C.胸骨左缘和心底部
D.胸骨左缘和心尖部
E.心尖部
答案
参考答案：C
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二尖瓣后叶关闭不全（）。
A.颈部和锁骨上窝
B.左腋下和肩胛下区
C.胸骨左缘和心底部
D.胸骨左缘和心尖部
E.心尖部
参考答案：C
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| London is such a wonderful city. It is very large. The Thames River runs 1 the city from west to east. So the city has 2 parts: the South and the North. In the North, there are important buildings, shops, big parks and interesting places. The weather in London is good. In winter it is not very cold and in summer it is not very hot 3 the city is near the sea. People say 4 London is a foggy city and it often rains. It is true. Last year, when I 5 in London I met one of the 6 fogs in years. You could hardly see your hand in front of your face. Cars and buses moved along with their lights on. When evening fell, the weather 7 even worse. The fog was as thick as milk. 8 the buses and cars stopped. I happened 9 an important meeting on the other side of the town, but it was impossible to find a car. I had to get there 10 . | ||||
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