He came to a point _______ there was no more road to follow, and before him he could see nothing but a thick forest.

A． where

B．what

C．which

D．that

肠套叠有意义的检查结果是

A．甲胎蛋白阳性
B．X线钡灌肠造影见“杯口状”阴影
C．X线钡剂造影可见龛影
D．血沉加快
E．血清T₃T₄升高