语法与词汇 In order to prevent stress from being set up in the metal, expansion joints are fitted which _____ the stress by allowing the pipe to expand or contract freely.无
【正确答案】 A
【答案解析】句意: 为了阻止应力在金属中形成, 应该安装伸缩接头来通过允许管道自由扩张或收缩来缓解压力。 relieve缓解。 reconcile使一致。 reclaim抗议。 rectify改正。 因此选A。