未知题型 听力原文： (24[A]) Northern Ireland peace talks resumed yesterday with negotiations under orders from the US Chairman George Mitchell, former US Senator, (23[C]) to stop haggling and get down to the business of solving the worst violence in the province, 'The time has come to get down to serious negotiations and not to waste your time on full stops and commas. There is an urgent need for this process to proceed.' George Mitchell said.The talks, launched with fanfare by the British and Irish governments in June 12, started, however, without representatives of the key players, the IRA guerrillas fighting the British rules.Who is George Mitchell?A．A representative of the IRA guerrillas.B．A key player.C．A former US SenatorD．A businessman and writer.

单项选择题 合同是平等主体的自然人、法人或者其他组织之间设立、变更、终止民事权利义务关系的意思表示一致的协议。因此,它是( )方以上当事人的法律行为。

未知题型 根据管道内物质的一般性能，下列关于工业管道识别色的说法错误的是（ ）。