2. 外语
  3. Our research has focused on a drug which is so ________ as to be able to change brain chemistry.

Our research has focused on a drug which is so ________ as to be able to change brain chemistry.

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问题 Our research has focused on a drug which is so ________ as to be able to change brain chemistry.
选项 A、powerful
B、influential
C、monstrous
D、vigorous
答案A
解析 形容词辨义。powerful意为“强有力的，有效的”，如：The headmaster is a powerful man．(校长是个强有力的人物。)influential意为“有影响的，有势力的”，如：influential politicians(有势力的政客)；monstrous意为“异常大的”，如：a monstrous tidal wave(一股巨大的浪潮)；vigorous意为“精力旺盛的，强健有力的”，如：The vigorous young plants grew fast．(这些茂盛的小植物生长得很快。)在这四个形容词中，只有 powerful可与表示药物的名词搭配。
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