Our research has focused on a drug which is so ______ as to be able to change br

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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 (Powerful强有力的，有效力的)。句意为：我们的研究集中在一种药物上，该药的效力足以改变大脑的化学组成。B．influential有影响力的；C．monstrous可怕的、极恶的；D．vigorous精力旺盛的。

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