I don't think Richard could have done such a stupid thing last night, ________?  [ ]

A. do I          

B. could he        

C. did he        

D. has he

眼球MR扫描，选用哪一种线圈()

A．环形眼眶表面线圈

B．头颅表面线圈

C．颅颈表面线圈

D．体线圈

E．肩线圈