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Old men and women are hard to live with.

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One of the main features of our human languages is arbitrariness. Can you briefly explain

Each of the following columns illustrates a different morphological process. Column I Column II Column III mouse/mice go/went record/record ride/rode is/was import/import take/ took good/better convict/convict man/men she/her imprint/im print eat/ate am/are dispute/dispute What morphological process is at work in each column？ Describe in your own words the difference between the process exemplified in Column I and that in Column II. (3)Think of at least one more English example to add to each column.

船舶发生火灾时，干馏的危害主要表现在_____。1、产生的有毒气体对进入该区域进行消防作业的人员构成威胁2、产生的有毒气体温度都很高，人员在没有任何防护措施的情况下吸入会窒息3、产生的易燃有害气体在遇到新鲜的空气，温度达到燃点温度后，会重新燃烧4、产生的浓烟会降低舱室内的能见度

A. 1、2、4
B. 2、3
C. 1、2、3

形成自然的热能有_____。

A. 氧化热
B. 分解热
C. 氧化热和分解热