单项选择题 "Our life is ______ away by detail. Simplify, simplify. " That dictum of Henry David Thoreau's, echoing from the days of steamboats and ox-drawn plows, had long haunted me.

单项选择题 The view from the 23rd floor of the sleek tower on Barcelona's Avenida Diagonal ______ opaquely as summer smog oozes across the Olympic landscape below.

单项选择题 Colour-blind people often find it difficult to ______ between blue and green.