问题
单项选择题 A型题
肌袖位于（）。
A.主动脉
B.肺动脉
C.上腔静脉
D.下腔静脉
E.肺静脉
答案
参考答案：E
解析：心房肌可围绕肺静脉延伸1～2cm，称为肌袖，具有括约肌样作用。
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肌袖位于（）。
A.主动脉
B.肺动脉
C.上腔静脉
D.下腔静脉
E.肺静脉
参考答案：E
解析：心房肌可围绕肺静脉延伸1～2cm，称为肌袖，具有括约肌样作用。
Professor Williams lived alone and he was very ．He used to arrive at the university to give a lecture and find that he had forgotten to bring his notes．Or he would lose his spectacles and be unable to see the ．He could never find any chalk to with，and he often forgot the time and would ramble(漫谈)on for hours because he had his watch at home．But the most thing of a11 about him was his ．His overcoat was rarely ，as most of the buttons were ．His shoes were usually untied because he had lost the laces．He must have lost his comb as well because his hair was always standing on．His trousers were by an old tie instead of a belt．He was a chain smoker．He would smoke in class．Cigarette ash was liberally scattered over his waistcoat．
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