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男性，28岁。心悸气短10年，胸闷胸痛，活动中晕厥发作，下肢浮肿。查体：心脏大，心尖部舒张期杂音，胸骨左缘3肋间3/6收缩期杂音，肝大，下肢水肿。心电：Af，超声二尖瓣，主动脉瓣增厚，开放受限。

若考虑外科治疗以下哪项最佳选择（）

A．二尖瓣闭式分离，主动脉瓣置换

B．二尖瓣，主动脉瓣双瓣置换

C．二尖瓣置换，主动脉瓣扩张

D．二尖瓣扩张，主动脉瓣置换

E．单纯二尖瓣置换

答案

参考答案：B

阅读理解

Zhang Lili, a young teacher from Heilongjiang, has been given the honor “the most
beautiful teacher”. She risked her life to save 2 students from a high-speed bus in
May.2012.  She was badly injured in the accident. Her good deed(事迹) and brave
acts have won great admiration from across the country. Many people have sent best
wishes to her and donated a lot of money for her treatment(治疗).
Zhu Zhiwen was born in Shandong in 1969. A year ago, he was an unknown farmer. But now he is very famous because of his great voice. He won the first prize in the program of “I’m a Big Star”. That day, he won an old green overcoat, so people called him “Overcoat Brother”.
He studied singing by listening to the radio. And he keeps practicing singing every morning for nearly 30 years.
Lin Shuhao is known to people because of his high skill of playing basketball. Since February 4, 2011, he has led his team to win many games. Now he is so popular on the Internet that the videos about him are being crazy spread.
小题1:Zhang Lili has been given the honor “the most beautiful teacher” because__________.
A．she was badly injured
B．she risked her life to save two students
C．she has a lot of money
D．She was good at teaching.
小题2:What’s the meaning of the word “admiration” in the passage?
A．敬佩B．同情C．讨厌D．感激
小题3:Where is Zhu Zhiwen from?
A．HeilongjiangB．CaliforniaC．ShandongD．Da Lian
小题4:Lin Shuhao is _______.
A．an America teacherB．a farmer singerC．a basketball playerD．a runner
小题5:From the passage we can know _______.
A．people have donated a lot of money for two students’ treatment
B．Zhu Zhiwen studied singing by professional training
C．Lin Shuhao was born in China
D．Lin Shuhao is known to people because he is good at playing basketball.
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综合

重金属污染物对人体健康危害巨大。图1为重金属污染物进入人体的路径示意图，图2为某高速公路两侧土壤中铅、镉浓度示意图。读图回答问题。

（1）产生重金属污染的生产活动有__________和_________。重金属污染物进入人体的途径有__________和__________。

（2）下列示意图①、②、③能正确表示重金属元素在环境中循环过程的是_______________。

（3）高速公路两侧土壤中重金属污染物浓度的分布特点是_____________；其主要来源是___________。

（4）降低高速公路两侧土壤重金属污染物浓度的有效措施主要有__________。
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