The Chinese lunar New Year usually ______ two records: the world's most watched television gala show, and its busiest telecommunications network.

A．develops

B．witnesses

C．establishes

D．launches

合同主要条款未达成一致的法律后果是( )

A．合同不成立

B．合同无效

C．按交易习惯补充

D．合同效力待定