______ were Nanjing's roads ______ in the past? [ ]

A．What; /

B．What; like

C．How; /

D．How; like

术中输血输液引起异常出血的原因有（）

A.误输异型血

B.快速输血及大量输血

C.库存血温度高

D.库存血枸橼酸的含量低

E.输入大量右旋糖酐干扰凝血功能