18．It is reported that Americans eat too much protein every day，_______ as they actually need．（　　）
A．twice as muchB．as twice muchC．much as twiceD．as much twice

分析 據(jù)報(bào)道美國(guó)人每天吃太多的蛋白質(zhì)，是他們實(shí)際需要的兩倍．

解答 答案：A 句意表達(dá)的是倍數(shù)；英語(yǔ)中as…as…表示倍數(shù)時(shí)，倍數(shù)要位于as前，即twice as…as…故選A．

點(diǎn)評(píng) 本題考查倍數(shù)表示法．英語(yǔ)中倍數(shù)的表示法有三種：倍數(shù)+as…as…；倍數(shù)+比較級(jí)+than；倍數(shù)+the size/length/weight/width/height/speed of．學(xué)習(xí)時(shí)，要注意區(qū)分和掌握．

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