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问题 单项选择题

某男，56岁，患冠心病多年，3小时前突然出现下肢剧烈疼痛，行走困难，局部皮肤苍白，查双下肢股动脉搏动消失，双股以下皮温低，肌力4级，诊断为（）。

A.血栓闭塞性脉管炎

B.髂股动脉栓塞

C.动脉粥样硬化性动脉闭塞症

D.糖尿病性动脉闭塞

E.大动脉炎

答案

参考答案：B

解析：该患者冠心病多年，双下肢症状急性发作，最可能考虑为血栓进入股动脉，造成股动脉血流阻塞，引起双下肢急性缺血，故诊断为髂股动脉栓塞，A、C、E项均为慢性起病，患者无糖尿病病史故排除D项。

听力题

根据短文内容及首字母提示完成短文。（每空一词）

Friends play an important part in our lives. We may have many friends, but we often don’t understand c   71  how we make friends. We may get on well with a n   72   of people, but we usually make friends with a very few of them.

People use the word "friend" freely. Friends may k   73 each other since childhood or they may recently meet. In fact, people many have different k   74  of friends such as school friends, work friends, or sports friends. A person may c   75   different friends for different activities. If you play with s   76  on the playground, the person is your playmate. If you often play chess w   77  a friend, the person is your chess partner.

One may have many good friends and only one best friend. " Best friends" or "close friends" are u   78  two people who have known each other for a long time. A close friend is someone who is able to s   79  experience, joys and sorrows(悲伤) with you. This is a person you can rely on (信赖) when you are in n   80  , and this is the person to whom you are willing to lend a helping hand.

Friendship is one of life’s greatest treasure.
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单项选择题

大多数食用菌，子实体的分化形成和生长需要一定的（）。

A、强光

B、暗光

C、光照

D、散射光
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