Which of the following diaphragm images is abnormal（）
A. Turtle sign
B. The atelectasis is smooth and wavy
C. Adult, the right diaphragmatic top is often slightly higher than the left diaphragm
D. The anterior costophrenic angle is higher than the posterior one
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Heart, ascending aorta, aortic arch, trachea, main bronchus and their lymph nodes are located in____（）
A. middle mediastinum
B. anterior mediastinum
C. posterior mediastinum
D. superior mediastinum
The exudate produced by pleurisy can be_____（）
A. all of the above
B. bloody
C. purulent
D. purulent
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
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