If two theories are equal (to) their ability to account (for) a body of data, the theory that (does so) with the smaller number

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问题 If two theories are equal (to) their ability to account (for) a body of data, the theory that (does so) with the smaller number of assumptions is (to be preferred).

选项 A、to
B、for
C、does so
D、to be preferred

答案A

解析 改to为in。本题考查对介词用法的掌握。be equal to为固定搭配,意为"在某方面相等"。但本句是指"这两种理论在解释…的能力方面相等",故应改to为in,in their ability意为"在能力方面"。
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