分析 幾乎所有的食物都來(lái)自土壤.當(dāng)然,我們中的一些人吃肉,但動(dòng)物也靠植物生活.如果沒(méi)有植物,我們就沒(méi)有動(dòng)物、沒(méi)有肉.所以土壤對(duì)生命而言是非常必要的地面的頂部通常覆蓋著草或其他植物.草地上可能有枯死的落葉和死亡植物,動(dòng)物的排泄物也落在它上面.
所有的土壤都需要食物,如果我們不給它,植物會(huì)生病變?nèi)酰畡?dòng)物的排泄物是土壤最好的食物,但是化肥也是非常有用的.同樣的莊稼不應(yīng)該每年在同一地方種植,最好種植不同的作物.作物的改變和良好肥料的使用將保持土地狀況良好.
解答 41.C.細(xì)節(jié)理解題.根據(jù)Nearly all our food comes from the soil(土壤).可知,所有的食物均來(lái)源于土壤,因此雖然植物對(duì)我們的生活非常重要,但是The top of the ground is usually covered with grass or other plants.地表長(zhǎng)著各種草和植物,因此the soil where the plants grow is more important,即生長(zhǎng)著植物的土壤更加重要;
42.A.細(xì)節(jié)理解題.根據(jù)The same crop(莊稼) ought not to be grown in the same place every year;可知,同樣的莊稼不應(yīng)該每年在同一地方種植,言外之意就是在一年中,要種植不同的莊稼,這一點(diǎn)在下文中也提到了:A change of crop and the use of a good fertilizer will keep the land in good condition.即作物的改變和良好肥料的使用將保持土地狀況良好.
43.B.細(xì)節(jié)理解題.根據(jù)Animal's wastes is the best food for the soil;可知,動(dòng)物的排泄物是土壤最好的"食物",因此這里應(yīng)該選擇B.
44.D.細(xì)節(jié)理解題.根據(jù)文章最后一句A change of crop and the use of a good fertilizer will keep the land in good condition.可知,不同作物的交替種植和良好肥料的使用將保持土地狀況良好,即如果我們想充分利用土壤生產(chǎn)更多的食物,我們就必須保證土壤的狀況良好,選用的方法就是A change of crop和the use of a good fertilizer,即D選項(xiàng)正確.
點(diǎn)評(píng) 本文是一篇關(guān)于土壤改良及合理使用土壤的科普類文章.做題時(shí)要在理解好文意的基礎(chǔ)上,與題目有機(jī)的結(jié)合,從文章中找到相關(guān)細(xì)節(jié)性的句子與選項(xiàng)細(xì)細(xì)比對(duì),進(jìn)行選擇或推理判斷,選出符合文章內(nèi)容的正確選項(xiàng).做題注意靈活,有時(shí)可采用排除法或直選法確定出最終答案.
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