【摘要】2017年職稱英語考試備考中，環(huán)球網(wǎng)校為幫助大家備考特分享了“職稱英語(衛(wèi)生a類)真題閱讀理解練習(xí)及答案”供大家練習(xí)，更多資料敬請關(guān)注環(huán)球職稱英語考試頻道，網(wǎng)校會(huì)及時(shí)更新考試資訊……

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　　Deforestation and Desertification(沙漠化)

　　The Sahel zone lies between the Sahara desert and the fertilesavannahs(熱帶大草原)of northern Nigeria and South Sudan. The word sahel comes from Arabic and means marginal or transitional ,andthis is a good description of these semi-arid (半干旱)lands, whichoccupy much of the Western African countries of Mail, Mauritania, Niger, andChad.

　　Unfortunately, over the last century the Sahara desert has steadilycrept southwards eating into once productive Sahel lands. United Nationssurveys show that over 70 percent of the dry land in agriculture use in Africahas deteriorated over the last 30 years. Droughts have become more severe, themost recent lasting over twenty years in parts of the Sahel region. The sameprocess of desertification is taking place across southern Africa as theKalahari desert advances into Botswana and parts of South Africa

　　One of the major causes of this desert advance is poor agriculturalland use, driven by the pressures of increasing population. Overgrazing 一 keeping toomany farm animals on the land一 means that grasses and other plants cannot recover, and scarcewater supplies are exhausted. Overcultivation 一 trying to grow toomany crops on poor land 一 results in the soil becoming even less fertile and drier, andbeginning to break up. Soil erosion (侵蝕) follows, and theland turns into desert.

　　Another cause of desertification is loss of tree cover. Trees arecut down for use as fuel and to clear land for agricultural use. Tree rootshelp to bind the soil together, to conserve moisture, and to provide a habitatfor other plants and animals. When trees are cut down, the soil begins to dryand loosen, wind and rain erosion increase, other plant species die, andeventually the fertile topsoil may be almost entirely lost, leaving only barerock and dust.

　　The effects of loss of topsoil and increased drought are irreversible.They are, however, preventable. Careful conservation of tree cover andsustainable agricultural land use have been shown to halt deterioration ofsoils and lessen the effects of shortage of rainfall. One project in Kita insouth-west Mali funded by UNDP has involved local communities in sustainablemanagement of forest, while at the same time providing a viable(有活力的)agriculturaleconomy. This may be a model for similar projects in other West Africancountries.

　　1.The Sahel zone is anarea which ___.

　　A.is covered with sad and grass

　　B. has a long history

　　C. occupies much of South Nigeria

　　D. belongs to Sudan

　　2. What is the situation about thedesertification in Africa?

　　A. The deserts are replaced with grasslands

　　B.The deserts are expanding

　　C. the deserts are moving northwards

　　D. the deserts are being deserted

　　3. The word “deteriorated ” in paragraph 2means ___.

　　A. deepened

　　B. suffered

　　C. slipped

　　D.worsened

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　　環(huán)球網(wǎng)校友情提示：2017年職稱英語考試馬上開始，本文小編整理“職稱英語(衛(wèi)生a類)真題閱讀理解練習(xí)及答案”，如果您在此過程中遇到任何疑問，請登錄環(huán)球網(wǎng)校職稱英語頻道及論壇，我們隨時(shí)與廣大考生朋友們一起交流!

　　【摘要】2017年職稱英語考試備考中，環(huán)球網(wǎng)校為幫助大家備考特分享了“職稱英語(衛(wèi)生a類)真題閱讀理解練習(xí)及答案”供大家練習(xí)，更多資料敬請關(guān)注環(huán)球職稱英語考試頻道，網(wǎng)校會(huì)及時(shí)更新考試資訊……

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　　4. What is the root cause ofdesertification?

　　A.poor farming

　　B. overpopulation

　　C. radical climate change

　　D. disappearance of rare plant species

　　5. In order to prevent desertification, theauthor proposes ___.

　　A. making good use of international aids

　　B.developing a sustainable agricultural economy

　　C. gaining international support

　　D. converting agricultural land into forest

　　環(huán)球網(wǎng)校職稱英語熱門套餐推薦：

　　職稱英語理工A考生70分通關(guān)經(jīng)驗(yàn)分享

　　職稱英語考試上班族備考策略分享

　　職稱英語怎樣快速做完閱讀理解

　　環(huán)球老師分享職稱英語語法提高技巧

　　環(huán)球網(wǎng)校友情提示：2017年職稱英語考試馬上開始，本文小編整理“職稱英語(衛(wèi)生a類)真題閱讀理解練習(xí)及答案”，如果您在此過程中遇到任何疑問，請登錄環(huán)球網(wǎng)校職稱英語頻道及論壇，我們隨時(shí)與廣大考生朋友們一起交流!