The girl in the photo was smiling sweetly, ________.

A．her long hair flowed in the breeze

B．her long hair was flowing in the breeze

C．her long hair flow in the breeze

D．her long hair flowing in the breeze

血—脑脊液屏障的结构基础是()

A．软膜下胶质膜

B．血管周围星形胶质细胞足板

C．脉络丛毛细管内皮细胞窗孔

D．脉络丛上皮细胞之间的闭锁小带

E．脉络丛毛细血管基膜