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问题 单项选择题

显象剂主要由（）配成的

A、低沸点的有机溶剂

B、煤油

C、白色吸附物质

D、红色染料

E、a和c

答案

参考答案：E

改错题
短文改错。此题要求改正所给短文的错误。对标有题号的每一行做出判断：如无错误，在该
行右边横线上划一个勾（√）；如有错误（每行只有一个错误），则按下列情况改正：
该行多一词：把多余的词用斜线（\）划掉，在该行右边横线上写出该词，并也用斜线划掉。
该行缺一个词：在缺词处加一个漏字符号（∧），在该行右边横线上写出该加的词。
该行错一个词：在错的词下划一横线，在该行右边横线上写出改正后的词。
注意：原行没有错的不要改。
Dear Betty,                                                            
     Yesterday my roommate invite me to celebrate Thanksgiving            
Day with him in her house. I accepted his invitation, but as you know,  
the social customs in my country is quite different from those here.  
I am a little nervous now. I’m worried about make mistakes and      
losing faces before many people, too.                               
Should I bring a gift, such as candy or flowers? But should           
I arrive at on time or a little late? At the dinner table, how can I   
know which fork or knife to use? How can I let a family know        
that I’m thankfully for their kindness?                                 
     I really find hard to decide, please help me.                                                         
Yours,                                                                  
Knowing Nothing                    		1______
2______
3______
4______
5______
6______                
7______
8______
9______
10______
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单项选择题 A1/A2型题

对食管异物的描述，正确的是（）。

A.食管镜检查不可能发生呼吸困难

B.钡餐透视是诊断食管异物最准确的方法

C.食管各段的异物发病率无明显差别

D.带钩刺的异物已刺入食管壁不能顺势取出时，不要强行拉出，必要时请胸外科会诊

E.食管异物不会出现致命性并发症
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