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.
7. Since the 1930's aircraft manufacturers have tried to build airplanes with frictionless[ wings, shaped so smoothly and perfectly ]that the air passing over them would not become turbulent.
(A) wings, shaped so smoothly and perfectly (B) wings, wings so smooth and so perfectly shaped (C) wings that are shaped so smooth and perfect (D) wings, shaped in such a smooth and perfect manner (E) wings, wings having been shaped smoothly and perfectly so is the answer B sound with two "wings"? or the answer is wrong again?
13. 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 the answer is B in what 指代exist in areas 中的area,请问 能用in what 指代地点吗?
The second “wings” serves as an appositive to describe the first one,thus miaking the intended meaning more clearly and unambiguously.So it cannot be ommited.