主要依靠现代影像学检查的是()

A．胃肠道病变

B．骨骼病变

C．肝、胆、胰病变

D．脊髓病变

E．神经病变

I was talking with my monitor when a fight ________between the students of the two classes.[ ]

A. blocked out      

B. hung out        

C. watched out      

D. broke out