— "Could we put off the meeting?" she asked.

— "_____." He answered politely. "This is the only day everyone is available." [ ]

A. Not likely

B. Not exactly

C. Not nearly

D. Not really

由于地质因素造成的井壁不稳定，通常采用提高钻井液密度，以较高的液柱压力来平衡井壁岩石侧压力来解决。