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Because of such factors, engineers have worked on increasing the efficiency of elevators, resorting to double-decker cars to service and to transfer systems that ______ express and local elevators.

A.explore
B.enforce
C.deploy
D.strengthen

参考答案

参考解析
解析:本题考察词义辨析。题目意为“由于这些因素,工程师们一直在努力提升电梯的效率,借助于双层汽车服务和传递系统来强化运输和当地的电梯。”A选项意为“探索,探测”,B选项意为“实施,执行”,C选项意为“部署,配置”,D选项意为“加强,巩固”。根据前句的提升效率,后句中应该是加强电梯。
  
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