Of even greater ___5___ is the fact that obesity turns out to be very difficult to define. It is often defined ___6___ body mass index, or BMI. BMI ___7__ body mass divided by the square of height. An adult with a BMI of 18 to 25 is often considere...
It 6 out that the brain needs exercise in much the same way our muscles do, and the right mental 7 can significantly improve our basic cognitive 8 . Thinking is essentially a 9 of making connections in the brain. To a certain extent, our ability to...
they often choose to migrate with their jobs, work around the clock and rest with the work files, leaving parents in empty-nests. Besides, many people are used to substituting their care for parents with money or gifts. While it is beyond dispute t...
2013年的完型文章难度适中,无论原文还是选项基本都是以常词为主。文章选自《经济学人》中的一篇题为A question of judgment的文章,逻辑性很强。 文章首句就明确给出了整篇文章的中心主线—People are, on the whole, poor at considering background 。文章结构往往采...
27 It is implied in paragraph 2 that the current immigration stystem in the US___ [A] needs new immigrant categories. [B] has loosened control over immigrants. [C] should b...
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