强化专项：比较对象、维度与基准

唯一新困难：比较基准

more, less, better, unlike, compared with 必须带着比较对象和比较维度理解。干扰项会保留“更好”方向，却更换基准或维度。本课只练四格：谁、与谁比、比什么、在何种条件下。

自拟短文

Compared with printed manuals, short instructional videos helped beginners complete a repair faster. Experienced technicians, however, performed at similar speeds with either format and made slightly fewer errors when using the manuals.

题目：What advantage did videos show in the study?

A. They reduced errors for experienced technicians.
B. They helped beginners finish more quickly than manuals did.
C. They made every participant faster and more accurate.
D. They contained more detailed information.

四格还原

主体 beginners；基准 printed manuals；维度 completion speed；结果 videos faster。B 完整保留四格。

A 把 experienced technicians 的错误优势方向反转；C 扩大群体并把速度优势扩展到准确性；D 添加文章未比较的信息量。

比较中的省略

than manuals did 中 did 替代 helped beginners complete a repair。若不还原，可能误以为比较“视频速度”和“手册速度”，实际比较的是使用两种格式时初学者完成任务的速度。

迁移练习

能否推出“视频总体优于手册”？

**答案：**不能。优势依赖群体和指标：初学者速度受益，熟练者速度相近且手册错误略少。

独立动作验收

为初学者和熟练者分别填写比较四格，并指出 C 同时偷换了哪两个边界。只说 C 太绝对不通过。