The company wanted a manager with ______ knowledge of English and ______ work experience. [ ]

A. /;/

B. a;/

C. the; a

D. the; the

当我们梳头时常有一些头屑落下来，头屑属于细胞死亡了的[ ]

A．结缔组织

B．上皮组织

C．肌肉组织

D．神经组织