Have a careful thought of______you are doing and tell how you fell about it.

A．what

B．which

C．that

D．whether

脾贫血性梗死的肉眼形态：（）

A.梗死灶为灰白色

B.切面呈扇形或楔形

C.梗死灶尖向脾门，底向器官的表面

D.梗死灶周围有充血出血带