觀察下列句子，歸納出畫線部分的句型結(jié)構(gòu)。

1．This special strain of rice makes it possible to produce one-third more of the crop in the same fields．

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2．Using his hybrid rice farmers are producing harvest twice as large as before．

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答案：
解析：

　　1．make it＋adj．＋to do…“使做某事成為……”。

　　2．倍數(shù)比較。


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