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问题 单项选择题

男性，65岁，慢性咳嗽20多年，有肺气肿史。1周来咳嗽剧烈，黄痰不易咳出，气促加重，发绀，血气分析：pH值7.31，PaO26.66kPa，PaCO2 7.99kPa，如何改善缺氧

A．立即吸入高浓度氧

B．间歇吸入纯氧

C．持续低流量吸氧

D．低浓度持续给氧，病情好转后逐渐增加氧浓度

E．立即用过氧化氢静脉注射

答案

参考答案：C

阅读理解
仔细阅读以下每个人对他们去的地方的描述，然后与方框相关的选项相匹配，并将正确答案前的字母编号填写在题前的括号内。
( ) 1. Tom: I went to the Great Wall to spend the May Day holiday with my parents.
( ) 2. Lucy: I went to a summer camp during the vacation to improve my spoken English.
( ) 3. George: I went to New York City on Business (出差) last month. I stayed there for a week.
( ) 4. Bill: I went to a concert last night with some of my friends. We are all music fans.
( ) 5. Maria: I spent seven days at a beautiful and famous beach in August.
A. It was really wonderful. The sea and the sky were clear and blue. But it was a little hot and the 
    sunshine was too strong.
B. The music was Fantastic! All of us were quite excited and even danced to the music.
C. I met many English speakers there. They were friendly and we became friends soon. I practiced
    my English as much as I can.
D. It is old but quite wonderful and famous. We took a lot of pictures there. But there are too many
     people during the holiday and it was too crowded.
E. It was really great! We ate a lot of delicious food there.
F. It is a modern city. I can see tall buildings everywhere. But I was too busy to enjoy its beauty.
G. I saw so many interesting animals there. I took a lot of photos of them.
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多项选择题

联合检测可以提高原发性肝癌诊断率的肿瘤标志物（）。

A.AFP

B.PAP

C.AFU

D.CEA

E.PSA
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