The unemployment rate has decreased 2% to 5.4%.compared with 7.4% last year．( )A．byB．fromC．withD．on 题目和参考答案——青夏教育精英家教网——

题目内容

12．The unemployment rate has decreased _____ 2% to 5.4%，compared with 7.4% last year．（　　）

A．

by

B．

from

C．

with

D．

on

分析与去年的7.4%相比，今年的失业比例已经下降了2%至5.4%．

解答答案是A．本题主要考查介词辨析．英语中表示"上涨或下降"的词都常常与to/by连用：强调最后的结果用"to"表示"上涨或下降到…"；强调变化的差距用"by"，表示"上涨或下降了…"；根据句意和介词搭配判断，去年是7.4%，所以今年"下降了2%至5.4%"，用"decrease by"，所以答案选择A．本题容易误选B；看成是from…to的搭配，如果用from，表达的意思是"从2%下降到5%"，很显然比例在增长，而非下降，逻辑错误；

点评介词辨析要在掌握各介词的基本用法和固定搭配的基础上结合语境做出符合逻辑、常理的推测．

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