In the rice-growing world, ______ Chinese scientist, Yuan Longping, is ______ leading figure.
A．a(chǎn); theB．the; aC．a(chǎn); aD．the; the
B

試題分析：定冠詞the表特指，用在表示特制的人或物的名詞前，本題中特指中國科學(xué)家。不定冠詞a、an表泛指，表示one、the same或every的意思。本句含義，在水稻種植領(lǐng)域，中國科學(xué)家袁隆平是一位杰出人士。故應(yīng)選B。
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