作文部分 argument是一个公司以前的每次增加雇员的时候利润都会增加，但是最近两年却没有，CEO就认为这是因为employees没有以前motivated and skilled了， 而这主要归结于人事部门没有发挥作用。 issue讲的是standards of what is beneficial or harmful to the environment change continually, so companies should resist changing their products and processes until those recommendations become government regulations.
Galileo’s parti non quante seem to account for his curious physical treatment of vacua. His attention had been directed to failure of suction pumps and siphons for columns of water beyond a fixed height. He accounted for this by treating water as a material having its own limited tensile strength, on the analogy of rope or copper wire, which will break of its own weight if sufficiently long. The cohesion of matter seemed to him best explained by the existence of minute vacua. Not only did he fail to suggest the weight of air as an explanation of the siphon phenomena, but he rejected that explanation when it was clearly offered to him in a letter by G. B. Baliani. Yet Galileo was not only familiar with the weight of air; he had himself devised practicable methods for its determination, set forth in this same book, giving even the correction for the buoyancy of the air in which the weighing was conducted.
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发表于 2011-6-7 16:41:21
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