In the rice-growing world, Chinese scientist, Yuan Longping, is leading figure.A. a; the

In the rice-growing world, Chinese scientist, Yuan Longping, is leading figure.
A. a; the
B. the; a
C. a; a
D. the; the

A. a; the(答案→)B. the; aC. a; aD. the; the解析：定冠词the表特指，用在表示特制的人或物的名词前，本题中特指中国科学家。不定冠词a、an表泛指，表示one、the same或every的意思。本句含义，在水稻种植领域，中国科学家袁隆平是一位杰出人士。故应选B。

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