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Our research has focused on a drug which is so _________as to be able to change brainchemistry.
A．powerful
B．influential
C．monstrous
D．vigorous
B．influential
C．monstrous
D．vigorous
参考答案
参考解析
解析：考查形容词辨析。句意为“我们的研究集中在一种能够改变大脑化学的药物上”。powerful“强有力的，效力大的”，influential“有影响的，有势力的”，monstrous“巨大的”，vigorous“精力旺盛的．强健有力的”。这四个形容词中，只有powerful可与表示药物的名词搭配。故选A。
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