GIST可发生在消化道的任何部位，从食管中段至肛门。GIST的最好发部位是（）
A.食管
B.胃
C.小肠
D.结肠
E.直肠
参考答案：B
简述儿童想象发展的特点。
Mr Holmes called at many schools_________he lived to ask them to accept his son,but he was refused everywhere for being a black.
A．where
B．around where
C．near which
D．which
