【題目】下圖是沼氣使用的示意圖，請認(rèn)真觀察，把這個示意圖的內(nèi)容寫成一段話。要求：表述準(zhǔn)確，語言簡明、連貫，不超過90字（標(biāo)點(diǎn)不計字?jǐn)?shù)）。（6分）

【答案】公廁和養(yǎng)豬場的糞便為沼氣池提供原料，沼氣池產(chǎn)生的肥料供菜園使用、產(chǎn)生的沼氣為廚房提供燃料；同時菜園為廚房提供新鮮的蔬菜，而廚房的剩飯剩菜為養(yǎng)豬場提供飼料，形成能源循環(huán)。

【解析】

【試題分析】本題考查學(xué)生圖文轉(zhuǎn)換，情景擴(kuò)寫的能力。圖文轉(zhuǎn)換的題型主要以下幾種：描述內(nèi)容，擬標(biāo)題，品寓意。本題要求的是描述內(nèi)容，要求做到客觀、全面，即把所呈現(xiàn)內(nèi)容按照一定的邏輯關(guān)系說明。這個示意圖主要表明沼氣的來源及作用。觀察這個示意圖時，要注意箭頭的指向和具體內(nèi)容。描述畫面時，要注意把握層次問題，比如第一層可以寫沼氣池中的肥料的來源；第二層寫沼氣池的具體作用；從菜園、廚房和養(yǎng)豬場的箭頭看，還要有第三層，即沼氣池的使用實際上是一個循環(huán)過程等。

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