2. 外语
  3. In some California housing estates, a key alone is insufficient to get someone in the door; his or her voiceprint must also be__

In some California housing estates, a key alone is insufficient to get someone in the door; his or her voiceprint must also be__

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问题 In some California housing estates, a key alone is insufficient to get someone in the door; his or her voiceprint must also be______.
选项 A、duplicated
B、perceived
C、acquired
D、verified
答案D
解析 本题考查动词的语义和句子的逻辑关系，是一道语境题。A复制；B感知，感受；C(尤指通过努力)取得，获得，学到；D证明、证实，核实、查清。该句的大意为：在加州的一些住房里单靠钥匙是开不了门的，还需验证房主的语音信息。
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