Computers and mobile phones, though they are indeed making our life ________ and more

________, have reduced the need for facetoface communications. [ ]

A. easily; efficient  

B. easier; efficient

C. easy; efficiently  

D. easily; efficiently

原发性肝癌肝内转移最常见的途径为

A．肝动脉

B．肝静脉

C．门静脉

D．胆管系

E．淋巴管