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问题 填空题
单数变复数。
policeman →                      
tooth →                        
watch →                         
dress →                        
boy →                      		woman →                       
box →                           
toothbrush →                      
chair →                        
couch →                                                                         
答案

policemen, women, teeth, boxes, watches,    

toothbrushes, dresses, chairs, boys, couches

选择题

You’d better practice more and play better if you want to make a good ______ on the audience at the concerts.

A．decision

B．impression

C．harmony

D．conclusion
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单项选择题

下列不属于鳃裂囊肿及瘘管临床表现的是（）

A.无痛性肿块

B.咽痛、吞咽困难

C.随吞咽上下活动

D.外瘘口分泌物溢出

E.与皮肤粘连
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