The exudate produced by pleurisy can be_____（）
A. all of the above
B. bloody
C. purulent
D. purulent
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Which of the following is the X-ray finding of teratomas（）
A. There is bone shadow or tooth shadow in the tumor
B. The tumor is located in the anterior mediastinum
C. The tumor is round, oval or lobulated
D. There are areas of reduced density in the tumor
Which of the following statements about diffuse pleural mesothelioma is incorrect（）
A. It can be classified as benign or malignant
B. There are multiple pleural nodules or lumps
C. There is a large amount of pleural effusion
D. Irregular pleura is thick and wavy
Neurogenic tumors are most likely to locate in____（）
A. posterior mediastinum
B. upper anterior mediastinum
C. Anterior mediastinum
D. upper middle region of middle mediastinum
The thyroid behind the sternum tends to occur in_（）
A. upper anterior mediastinum
B. middle anterior mediastinum
C. upper middle region of middle mediastinum
D. lower middle mediastinum
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