问题
单项选择题
二尖瓣位于（）。
A、右房室口
B、右房室口周围的纤维环
C、左房室口
D、左房室口周围的纤维环
E、为二片半月状瓣膜
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
二尖瓣位于（）。
A、右房室口
B、右房室口周围的纤维环
C、左房室口
D、左房室口周围的纤维环
E、为二片半月状瓣膜
参考答案：D
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| We were going to play with a team from a country school. They didn't come 1 the match nearly began. They looked 2 than we thought. They wore dirty T-shirts and blue jeans and looked like farm boys. We thought they 3 saw a basketball before. We felt that we didn't 4 any practice to play with such a team. It was very late so they couldn't have any time to practice. The match began. One of our boys 5 the ball and he tried to give it to another one. But from out of nowhere a boy in a T-shirt 6 the ball and he quickly and beautifully got the ball into our basket and had two points. They 7 us. They had another two points in a minute. Soon it was all over. The country team 8 the match. Of course we knew that there was still another team 9 than any good team. But the important lesson we learned this time was: One can't tell a man or a team by the 10 . | ||||
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