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、influential
B、powerful
C、monstrous
D、rigorous
答案B
解析 (powerful效力大的)。句意为：我们专门研究一种强效药，药力能够改变大脑的化学性质。A．influential有影响力的；C．monstrous巨大的，畸形的；D．rigorous严格的，严密的。
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