When we plan our vacation , mother often offers______suggestions.

A．careful

B．practical

C．concerned

D．promising

有关脑膜错误的描述中是()

A．脑膜由外向内为硬脑膜、蛛网膜和软脑膜

B．硬脑膜与颅骨内板之间的间隙称硬膜外腔

C．软脑膜伸入脑沟、裂内

D．脑膜中动脉走行于硬膜内外层之间

E．硬膜内层向内折叠形成大脑镰、小脑幕