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In the past, most children who went sledding in the winter snow in Verland used wooden sleds with runners and steering bars. Ten years ago, smooth plastic sleds become popular; they go faster than woooden sleds but are harder to steer and slow. The concern that plastic sleds aremore dangerous is clearly borne out by the fact that the number of children injured while sledding was much hinger last winter than it was ten years ago.
Which of the following, if true in Verland, most seriously undermines the force of the evidence cited? C. Plastic sleds can be used in a much wider variety of snow conditions than wooden sleds can. D. Most sledding injuries occur when a sled collides with a tree, a rock, or another sled. 我选的D,但答案是C,不明白之处在于D选项说的是受伤原因不是因为雪橇材料而是其它方面,正好驳斥了原文成立的前提。而C选项说的是塑料雪橇的使用条件范围问题,怎么看像是无关选项,而且也起不到驳斥作用。 |
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