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A landing on Mars is within the _____ of current physical theory.

  A. scheme    B. scope    C. scrap    D. scale

B


解析:

scope 范围,活动范围,理解犯围: 1 Many words are outside the scope of this dictionary. (许多单词是超出了这本词典的范围.) 2 Very hard words are not within the scope of a child's understanding。(非常难懂的 词是超出了一个孩子的理解范围.) 3 Economics is beyond the scope of a child's mind.(经济学是孩子理解不了的.)

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