—Tom, your foreign teacher speaks Chinese fluently!

—Oh, she has lived in China for six years, otherwise she _______ such good Chinese.

A．didn’t speak

B．would not have spoken

C．would not speak

D．hadn’t spoken

下列关于毛细血管的叙述不正确的是（ ）

A．静脉血经肺部毛细血管转变成动脉血

B．组织细胞间隙的毛细血管中氧气的浓度大于组织细胞中氧气的浓度

C．肾小球毛细血管中流动的是静脉血

D．小肠毛细血管回流的静脉血中，营养物质含量较多