As a result of __ is now known in physics and chemistry, scientists have been able to make important discoveries in biology and medicine.
A．itB．whatC．whichD．that
B

試題分析：句意：由于在物理學(xué)和化學(xué)上已知的知識(shí)的原因，科學(xué)家們已經(jīng)能夠在生物學(xué)和醫(yī)藥上取得重要發(fā)現(xiàn)。what 引導(dǎo)賓語(yǔ)從句，在從句中做主語(yǔ)。在賓語(yǔ)從句中，which 是哪一個(gè)，that不做成分。故選B。
考點(diǎn): 考查從句關(guān)系詞的用法。
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