no8-1求解

timicaoUID: 3131283

        Geologists have long known that the Earth’s mantle is heterogeneous, but its spatial arrangement remains unresolved—is the mantle essentially layered or irregularly heterogeneous? The best evidence for the layered mantle thesis is the well-established fact that volcanic rocks found on oceanic islands, islands believed to result from mantle plumes (地柱) arising from the lower mantle, are composed of material fundamentally different from that of the midocean ridge system, whose source, most geologists contend, is the upper mantle.
        Some geologists, however, on the basis of observations concerning mantle xenoliths, argue that the mantle is not layered, but that heterogeneity is created by fluids rich in “incompatible elements” (elements tending toward liquid rather than solid state) percolating upward and transforming portions of the upper mantle irregularly, according to the vagaries of the fluids’ pathways. We believe, perhaps unimaginatively, that this debate can be resolved through further study, and that the underexplored midocean ridge system is the key.

        20.        The authors suggest that their proposal for determining the nature of the mantle’s heterogeneity might be considered by many to be
        (A) pedestrian
        (B) controversial
        (C) unrealistic
        (D) novel
        (E) paradoxical
为什么选A，我觉得unimaginatively应该选C啊
求解答，谢谢。

timicaoUID: 3131283

自己顶一下。。。

yuyuechuanUID: 3313828

都是缺乏想象力的

leijerry888UID: 3143968

pedestrian

adj.徒步的,缺乏想像的n.行人