2. 外语
  3. ______the calculation is right, scientists can never be sure that they have included all variables and modeled them accurately.

______the calculation is right, scientists can never be sure that they have included all variables and modeled them accurately.

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问题 ______the calculation is right, scientists can never be sure that they have included all variables and modeled them accurately.
选项 A、Even if
B、As far as
C、If only
D、So long as
答案A
解析 句意：即使计算是正确的，科学家也不能确定他们是否包括了所有的变量，以及建模是否精确。由于后半句为否定句表转折，故填even if，意为“即便；即使”。
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本试题收录于： A类竞赛（研究生）题库大学生英语竞赛（NECCS）分类
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大学生英语竞赛（NECCS）

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