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单选题
These conventional techniques were applied over the centuries.
A
employed
B
explored
C
manipulated
D
innovated
参考答案
参考解析
解析：
应用，运用。句意：这些技术已被应用了几个世纪。employ雇佣，用，使用。explore探险，探测，探究。manipulate（熟练地）操作，使用（机器等），操纵（人或市价、市场）。innovate改革，创新。结合选项意思，只有A项与划线部分意思相近，故答案为A。
应用，运用。句意：这些技术已被应用了几个世纪。employ雇佣，用，使用。explore探险，探测，探究。manipulate（熟练地）操作，使用（机器等），操纵（人或市价、市场）。innovate改革，创新。结合选项意思，只有A项与划线部分意思相近，故答案为A。
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