校准记录应该包括哪些内容？
参考答案：
校准记录应当标明所用计量标准器具的名称、编号、校准有效期和计量合格证明编号，确保记录的可追溯性。
MIDI enables people to use (61) computers and electronic musical instruments. There are actually three components to M1DI, the communications " (62) ", the Hardware Interface and a distribution (63) called "Standard MIDI Files". In the context of the WWW, the most interesting component is the (64) Format. In principle, MIDI files contain sequences of MIDI Protocol messages. However, when MIDI Protocol (65) are stored in MID! files, the events are also time-stamped for playback in the proper sequence. Music delivered by MIDI files is the most common use of MIDI today.
A．Video
B．Faxmail
C．Graphic
D．Audio
《工伤保险条例》规定，用人单位应当将参加工伤保险的有关情况( )。
A．向工会备案 B．向劳动性质部门备案C．在本单位内公示 D．在报纸上公示
