You should______the wheels of your bicycle to reduce the friction.

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问题 You should______the wheels of your bicycle to reduce the friction.

选项 A、label
B、illustrate
C、lubricate
D、manipulate

答案C

解析 词义辨析。句意:你应该把自行车的轮子润滑一下,以减少摩擦。lubricate使……润滑;给……加润滑油。label标注;贴标签于。illustrate阐明,举例说明;图解。ma—nipulate操纵;篡改。
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