协助食物消化吸收的胆汁由以下哪种组织细胞分泌( )。
A.胆总管 B.十二指肠道 C.肝细胞 D.胆囊
参考答案:C
解析: 胆汁的分泌
________he visited, he wasted no time hearing farmers' voices at home and in the fields.
A.Each time
B.In case
C.Even if
D.In time
木质建材