The common mediastinal tumor in the hilum is___（）
A. lymphoma
B. teratoma
C. retrosternal goiter
D. thymoma
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Which is not an X-ray finding of thymoma（）
A. Which is not an X-ray finding of thymoma
B. The mass is located in the middle of the anterior mediastinum
C. The mass is fusiform or flat
D. The outline of the mass is lobulated or wavy
E. There is multi-chamber calcification in the mass
Which of the following tumors often occurs in the posterior mediastinum（）
A. Nerve sheath tumor
B. Thymopathy
C. Teratoma
D. Thyroid tumor
Special X-ray examination does not include（）
A. fluoroscopy
B. enlarged photography
C. molybdenum target mammography
D. tomography
The most common site of pleural adhesions is_____（）
A. costophrenic angle
B. pleura at the apex pulmonis
C. pleura at the apex pulmonis
D. mediastinal pleura
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