原句:Harmless by itself, isoprene interacts rapidly with polluting nitrogen oxides released by vehicles, buildings and industry to form ground‑level ozone — a major factor in many breathing problems.出处:高考英语阅读理解C篇,对应第28题
✅正确选项:Isoprene indirectly harms people’s health.解析:异戊二烯自身没有毒性,不会直接伤害人体;通过化学反应生成有害臭氧,间接危害健康,完美匹配原文逻辑链条。❌干扰项1:Isoprene is harmful to human health.解析:直接判定异戊二烯有害,和句首Harmless by itself矛盾,属于概念误判,是最容易误选的选项。❌干扰项2:Nitrogen oxides are produced mainly by plants.解析:原文写氮氧化物来自车辆、建筑、工业排放,本选项篡改排放来源,无中生有。❌干扰项3:Ground-level ozone is harmless when alone.解析:张冠李戴。原文“本身无害”描述的是异戊二烯,不是臭氧,把A的属性安在C身上。《关注雷sir 的高中英语笔记,持续解析真题阅读语法写作策略,高考提分不迷路。关注后私信:26真题1长难句6,下载pdf》
release /rɪˈliːs/ v. 释放,排放;熟词生义:v. 发行(影片、书籍);n. 发布
industry /ˈɪndəstri/ n. 工业;熟词生义:行业(tourism industry 旅游业)
ground-level adj. 地面的,近地面的
ozone /ˈəʊzəʊn/ n. 臭氧
a major factor in … ……的主要因素;同义替换:the main cause of …
breathing problems 呼吸疾病;同义替换:respiratory diseases
真题拓展训练(同结构长难句)
练习句子:Safe in small quantities, carbon monoxide interacts with hemoglobin carried in human blood to block oxygen transport — a key cause of tissue damage in organs.任务:①划出句子主干②分析各部分语法结构③翻译句子④完成选择题A. Carbon monoxide directly damages human organs.B. Carbon monoxide has an indirect bad influence on human organs.C. Hemoglobin is the main source of carbon monoxide.D. Carbon monoxide is dangerous even in tiny amounts.参考答案 主干:carbon monoxide interacts with hemoglobin 语法:Safe in small quantities形容词短语作让步状语;carried in human blood过去分词后置定语;to block oxygen transport不定式作结果状语;破折号后同位语,解释前面造成的后果。翻译:少量状态下一氧化碳本身是安全的,它会和人体血液内的血红蛋白结合,阻碍氧气输送,这是器官组织损伤的主要原因。✅答案:B 解析:少量一氧化碳本身安全,通过和血红蛋白结合,间接造成器官损伤。A错,不是直接损伤;C无中生有;D和Safe in small quantities矛盾。