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A serious study of physics is impossible________some knowledge of mathematics.
(2013·大綱全國，31)
A．a(chǎn)gainstB．before
C．beyondD．without
D

句意為：不掌握一定的數(shù)學(xué)知識是沒有辦法對物理學(xué)進行系統(tǒng)地研究的。without沒有，缺乏，符合句意。
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