At a rough estimate, Nigeria is ____ Great Britain.
A．twice big as B．a(chǎn)s twice big asC．three times the size as D．three times the size of
D

試題分析：句意：粗略估計(jì)，尼日利亞是大不列顛的三倍大。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）。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。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，由題干可知選D正確。
考點(diǎn): 考查形容詞倍數(shù)的用法。
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