Because of the septum secundum fails to close,we call this kind of atrail septal defect _____________________ . ()
A. fossa ovalis type
B. ostium secundum defect
C. superior vena caval defect
D. ostium primum defect
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Which branch of the coronary artery bypass graft is most common used left internal mammary artery? ()
A. Right;coronary artery
B. Left anterior descending
C. Posterior descending
D. Obtuse marginal branch
Esophageal carcinoma is treated by_____________________. ()
A. surgery
B. radiotherapy
C. chemotherapy
D. combination of surgery . radiotherapy and chemotherapy
Small cell cancer comprise____________________of all lung cancer. ()
A. 10-15%
B. 15%-20%
C. 20%-25%
D. 25-30%
The best diagnostic method of bladder stones is___________________. ()
A. according to typical symptoms
B. metal urethral probe inspection
C. KUB examination
D. cystoscopy