走行于大网膜内的结构是()。
A.肝固有动脉
B.胆总管
C.两者均是
D.两者均否
参考答案:D
It’s generally considered unwise to give a child he or she wants.
A.however
B.whatever
C.whichever
D.wherever
洞口石方严禁采用大爆破开挖�宜采用()石质地层的边、仰坡开挖应采用预留光爆层法或预裂爆破法。