摘要: Our research has focused on a drug which is so as to be able to change brain chemistry. A. powerful B. influential C. monstrous D. vigorous [答案] A. powerful [注释] powerful (=having or producing great power) 强有力的.在这里四个形容词中, 只有powerful 可与表示药物的名词搭配.influential 有影响的, 有势力的, monstrous 异常大的, vigorous 精力旺盛的, 强健有力的.

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