His studies of ice-polished rocks in his Alpine homeland, far outside the range of present-day glaciers, led Louis Agassiz in 1837 to propose the concept of an age ( in which great ice sheets had existed in now currently temperate areas. )
A in which great ice sheets had existed in now currently temperate areas
B in which great ice sheets existed in what are now temperate areas
C when great ice sheets existed where there were areas now temperate
D when great ice sheets had existed in current temperate areas
E when great ice sheets existed in areas now that are temperate
答案是D,错选了B。BD纠结,不知道该如何判断。第二遍做这道题还是把握不好句意,麻烦老师讲解。
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【请May老师回答】这题鸡精提供的答案是D 可是我觉得第二个条件不能得出呢 假设n三次方是x平方 除以n平方 是可以得到x/ n 平方 但是x/n 不一定是整数呀?