32.An air France jet is reported________in the Atlantic Ocean with 228 people aboard，the airline’s worst disaster in its 75-year history．

A．to have crashed

B．to have been crashed

C．having crashed

D．having been crashed

上消化道钡餐检查，胃溃疡的直接征象是（）

A.黏膜线

B.项圈征

C.狭颈征

D.龛影

E.胃小弯缩短