選B,本題考查倍數(shù)表達(dá)法的用法
這里有倍數(shù)表示的詳細(xì)說(shuō)明
倍數(shù)表達(dá)法是高中英語(yǔ)教學(xué)的重點(diǎn),也是歷屆高考的熱點(diǎn).當(dāng)我們要表達(dá)甲是乙的幾倍時(shí),通常用下面三個(gè)句型來(lái)表示：
1.“A+倍數(shù)+形容詞或副詞的比較級(jí)+than+B”,表示“A比B大（長(zhǎng)、高、寬等）多少倍”.如：
This rope is twice longer than that one.這根繩子是那根繩子的兩倍長(zhǎng)（比那根繩子長(zhǎng)一倍）.
This hall is five times bigger than our classroom.這個(gè)大廳比我們的教室大四倍(是我們教室的五倍).
The car runs twice faster than that truck.這輛小車的速度比那輛卡車快一倍（是那輛卡車的兩倍）.
2.“A+倍數(shù)+as+形容詞或副詞的原級(jí)+as+B”,表示“A正好是B的多少倍”.如：
Asia is four times as large as Europe.亞洲的面積是歐洲的四倍.
This big stone is three times as heavy as that one.這塊大石頭的重量是那塊的三倍.
The plane flew ten times as high as the kite.那架飛機(jī)的飛行高度是那只風(fēng)箏的十倍.
3.“A+倍數(shù)+the size/height/length/width,etc+of+B”,表示“A正好是B的多少倍”.如：
This street is four times the length of that one.這條街是那條街的四倍長(zhǎng).
This hill is four times the height of that small one.這座山的高度是那座小山的四倍.
除掌握倍數(shù)表達(dá)的三個(gè)常規(guī)句型外,我們更要注意的是其常規(guī)句型的變形及其特殊規(guī)律.
一.常規(guī)句型的變形
1.“ ...times+more+名詞（可數(shù)或不可數(shù)）+than+被比對(duì)象”.如：
There are five times more books in our library than in yours.我們圖書(shū)館里的書(shū)比你們圖書(shū)館多四倍.
We have produced twice more grain this year than we did last year.我們今年生產(chǎn)的糧食是去年的兩倍.
2.“ ...times as many/much+名詞+as+被比對(duì)象”.如：
There is four times as much water in this pot as in that one.這個(gè)壺里裝的水是那個(gè)壺里的四倍.
There are six times as many students as we expected.學(xué)生數(shù)量是我們預(yù)期的六倍.
3.“ ...times+over+被比對(duì)象”.如：
The grain output in that village is twice over that of 2002.那個(gè)村的糧食產(chǎn)量是2002年的兩倍.
4.“ ...times+that+of+被比對(duì)象 ”.如：
In this workshop,the output of July was 4.5 times that of January.這個(gè)車間7月份的產(chǎn)量是1月份的4.5倍.