肝细胞合成的胆汁首先进入()。
A.小叶中央静脉
B.肝血窦
C.肝闰管
D.胆小管
E.小叶间胆管
参考答案:D
Japan is a ______ country, and Cuba is a ______ country. [ ]
A. developing, developing
B. developed, developing
C. developing, developed
D. developed, developed
隧道横截面在开挖后所建的人工结构包括支护结构及()。
A.洞门
B.避车洞
C.承重结构
D.防、排水设施