The average global temperature has increased by almost 0 . 5 centigrade degree over the past century ; scientists expect it to rise by an extra 1 - 3 degrees over the next 100 years 全球平均气温比上个世纪增长了大约0 . 5度，科学家预计今后100年中气温还将升高1到3度。
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Common test methods for insulating and sheathing materials of electric cables - part 5 : methods specific to filling compounds - section 1 : drop point - separation of oil - lower temperature brittleness - total acid number - absence of corrosive components - permittivity at 23 centigrade degrees - d . c . resistivity at 23 centigrade degrees and 100 centigrade degrees 电缆绝缘和铠装材料的通用试验方法.第5部分:填充复合物的专用方法.第1节:滴点.油分离.较低温脆性.总酸数值.不腐蚀组分. 23下的电容率. 23和100下的直流电阻率
