( )是确定合同双方当事人权力义务关系的根本依据，也是判断合同是否有效的客观依据。
A、合同的形式C
暂无解析
Iwaswritingareportlastnight;________Iwouldnothavestayeduplate.
ModernEnglishwordsman,woman,child,eat,fight,etc,originatefrom______.
Thevolunteerswouldrathergobytrainthan________.
Ittookafewsecondsforhereyesto________tothedarkness.
Theengineer______myfatherworksisabout50yearsold.
