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 powerful a.强烈的。效力大的;强大的,有权的;强健的,力气大的。influential a.有影响的,有权势的。monstrous a.可憎的,可怕的;令人震惊的。vigorous a.有力的,用力的;精力充沛的。
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