题目
17.[单选题]The railway track plays a( ) role in train operation and directly bears the huge pressure of locomotive and vehicle and its load.A. carryingB. supportingC. differentD. guiding
17.[单选题]The railway track plays a( ) role in train operation and directly bears the huge pressure of locomotive and vehicle and its load.
A. carrying
B. supporting
C. different
D. guiding
题目解答
答案
B. supporting
解析
本题考查动词辨析在具体语境中的运用。关键点在于理解"play a role"的搭配以及"bear the pressure"的逻辑关系。
- 核心思路:根据后文"直接承受机车车辆及其载重的巨大压力",需选择描述轨道物理支撑功能的词汇。
- 破题关键:明确选项中supporting(支撑)与carrying(承载)的区别:前者强调结构上的托住,后者侧重运输过程。
选项分析
-
A. carrying
- 意为“运输、承载”,通常指主动运输行为(如“carry goods”),但题目强调轨道的物理支撑属性,而非运输功能。
-
B. supporting
- 意为“支撑”,指通过结构固定承受重量。后文“bear the pressure”直接对应“支撑”这一核心功能,符合语境。
-
C. different
- 明显与句意无关,排除。
-
D. guiding
- 意为“引导”,指方向控制,与“承受压力”无关,排除。
逻辑验证
轨道的核心作用是为列车提供稳定支撑,使其能够安全运行。"Supporting role"与"bear the pressure"形成完整语义链,进一步确认答案。