Japans abundant rainfall and the typically mild

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39. Japan’s abundant rainfall and the typically mild temperature throughout most of the country have produced a lush vegetation cover and, despite the mountainous terrain and generally poor soils, it has made possible the raising of a variety of crops. A. it has made possible the raising of B. has made it possible for them to raise C. have made it possible to raise D. have made it possible for raising E. thus making it possible for them to raise
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answer: ---------------------------------------------------------------------------------- 40. Scientists typically do their most creative work before the age of forty. It is commonly thought that this happens because aging by itself brings about a loss of creative capacity . However, studies show that a disproportionately large number of the scientists who produce highly creative work beyond the age of forty entered their field at an older age than is usual. Since by the age of forty the large majority of scientists have been working in their field for at least fifteen years, the studies’ finding strongly suggests that the real reason why scientists over forty rarely produce highly creative work is not that they have simply aged but rather that they generally have spent too long in a given field. In the argument given, the two portions in boldface play which of the following roles? ------------------------------------------------------------------------------------------------------- 41. In California, a lack of genetic variation in the Argentine ant has allowed the species to spread widely; due to their being so genetically similar to one another, the ants consider all their fellows to be a close relative and thus do not engage in the kind of fierce intercolony struggles that limits the spread of this species in its native Argentina.
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