丙二醇甲醚、丙二醇与水 共沸精馏模拟? block t303 is not in mass balance: mass inlet flow = 0.15202306e+02, mass outlet flow = 0.15210670e+02 relative difference = 0.55017831e-03 may be due to a tear stream or a stream flow may have been changed by a fortran, transfer, or balance block after the block had been executed. aspen小白求指点,怎么改都不能收敛.... 有高手帮我改一下的么 查看更多
不知道各位平时是怎么学习英语的? 我以前英语只有中学水平,通过自学,现在已小有成就,与老外开会基本没问题。 我的建议是,勤学苦练,贵在坚持,每天平均花一到二个小时学习英语。把学英语当作是一种爱好! step by step,little by little, many a little makes a mickle!查看更多