大學(xué)英語(yǔ)六級(jí)考試命題改革與預(yù)測(cè)試卷

內(nèi)容概要

CET-4：聽(tīng)力短對(duì)話第16題，聽(tīng)力長(zhǎng)對(duì)話Conversation One，仔細(xì)閱讀Passage Tw0，翻譯第89題　　CET-6：寫(xiě)作，聽(tīng)力短對(duì)話第13題，聽(tīng)力長(zhǎng)對(duì)話Conversation One．聽(tīng)力短文Passage Two，仔細(xì)閱讀Passage One

作者簡(jiǎn)介

盧小軍 上海交通大學(xué)外國(guó)語(yǔ)學(xué)院優(yōu)秀教師，上海外國(guó)語(yǔ)大學(xué)英語(yǔ)語(yǔ)言文學(xué)專業(yè)碩士。曾在多所著名培訓(xùn)機(jī)構(gòu)和學(xué)校任教，主講大學(xué)英語(yǔ)四、六級(jí)，考研英語(yǔ)，雅思等課程。主編《（全新版）大學(xué)英語(yǔ)綜合教程全程導(dǎo)讀》（1-4冊(cè)）和《15天征服英語(yǔ)六級(jí)一閱讀》、《15天征服英語(yǔ)六級(jí)一詞

書(shū)籍目錄

大學(xué)英語(yǔ)六級(jí)考試命題改革與預(yù)測(cè)試卷 Model Test One大學(xué)英語(yǔ)六級(jí)考試命題改革與預(yù)測(cè)試卷 Model Test Two大學(xué)英語(yǔ)六級(jí)考試命題改革與預(yù)測(cè)試卷 Model Test Three大學(xué)英語(yǔ)六級(jí)考試命題改革與預(yù)測(cè)試卷 Model Test Four大學(xué)英語(yǔ)六級(jí)考試命題改革與預(yù)測(cè)試卷 Model Test Five大學(xué)英語(yǔ)六級(jí)考試命題改革與預(yù)測(cè)試卷 Model Test Six大學(xué)英語(yǔ)六級(jí)考試命題改革與預(yù)測(cè)試卷 Model Test Seven大學(xué)英語(yǔ)六級(jí)考試命題改革與預(yù)測(cè)試卷 Model Test Eight大學(xué)英語(yǔ)六級(jí)考試命題改革與預(yù)測(cè)試卷 Model Test Nine大學(xué)英語(yǔ)六級(jí)考試命題改革與預(yù)測(cè)試卷 Model Test Ten大學(xué)英語(yǔ)六級(jí)考試命題改革與預(yù)測(cè)試卷答案詳解大學(xué)英語(yǔ)六級(jí)考試高頻詞匯大學(xué)英語(yǔ)六級(jí)考試臨考點(diǎn)津大學(xué)英語(yǔ)六級(jí)考試熱點(diǎn)預(yù)測(cè)作文大學(xué)英語(yǔ)六級(jí)考試聽(tīng)力特訓(xùn)

章節(jié)摘錄

　　Biotechnologists have developed genetically modified rice that is fortified with beta-carotene（β-胡蘿卜素）——which the body converts into vitamin A —— and additional iron,and they are working on other kinds ofnutritionally improved crops. Biotech can also improve farming productivity in places where food shortages arecaused by crop damage attribution to pests, drought, poor soil and crop viruses, bacteria or fungi（真菌）.　　Damage caused by pests is incredible. The European corn borer, for example, destroys 40 million tons ofthe worlds corn crops annually,about 7% of the total. Incorporating pest-resistant genes into seeds can helprestore the balance.In trials of pest-resistant cotton in Africa, yields have increased significantly. So far, fearsthat genetically modified, pest-resistant crops might kill good insects as well as bad appear unfounded.　　Viruses often cause massive failure in staple crops in developing countries. Two years ago, Africa lostmore than half its cassava（樹(shù)薯）crop——a key source of calories —— to the mosaic virus. Genetically modified,virus-resistant crops can reduce that damage,as can drought-tolerant seeds in regions where water shortageslimit the amount of land under cultivation. Biotech can also help solve the problem of soil that contains excessaluminum,which can damage roots and cause many staple-crop failures. A gene that helps neutralize aluminumtoxicity（毒性） in rice has been identified.　　Many scientists believe biotech could raise overall crop productivity in developing countries as much as25 % and help prevent the loss of those crops after they are harvested.　　Yet for all that promise, biotech is far from being the whole answer. In developing countries, lost crops are onlyone cause of hunger. Poverty plays the largest role. Today more than 1 billion people around the globe live on lessthan 1 dollar a day. Making genetically modified crops available will not reduce hunger if farmers cannot afford togrow them or if the local population cannot afford to buy the food those farmers produce.　　Biotech has its own"distributionproblems. Private-sector biotech companies in the rich countries carryout much of the leading-edge research on genetically modified crops. Their products are often too costly forpoor farmers in the developing world ,and many of those products wont even reach the regions where they aremost needed. Biotech firms have a strong financial incentive to target rich markets first in order to help themrapidly recoup the high costs of product development. But some of these companies are responding to needs ofpoor countries.　　More and more biotech research is being carried out in developing countries. But to increase the impact ofgenetic research on the food production of those countries, there is a need for better collaboration between government agencies——both local and in developed countries——and private biotech firms.The ISAAA, for ex-ample, is successfully partnering with the US Agency for International Development,local researches and pri-vate biotech companies to find and deliver biotech solutions for farmers in developing countries. Will"Franken-foods"feed the world？　　Biotech is not a panacea （治百病的）, but it does promise to transform agriculture in many developing countries. If that promise is not fulfilled, the real losers will be their people, who could suffer for years to come.

編輯推薦

　　風(fēng)靡全國(guó)，暢銷(xiāo)十年，8000萬(wàn)讀者的選擇?！　?009年12月命中9道真題375分。　　CET-4：聽(tīng)力短對(duì)話第16題，聽(tīng)力長(zhǎng)對(duì)話Conversation One，仔細(xì)閱讀Passage Tw0，翻譯第89題　　CET-6：寫(xiě)作，聽(tīng)力短對(duì)話第13題，聽(tīng)力長(zhǎng)對(duì)話Conversation One.聽(tīng)力短文Passage Two，仔細(xì)閱讀Passage One　　聯(lián)手名師 權(quán)威研究 經(jīng)典預(yù)測(cè) 頻傳命中喜報(bào)　　全國(guó)首創(chuàng)S-18高仿真真命題系統(tǒng)　　建立模型　　時(shí)文收集　　機(jī)器處理　　人工校檢　　命題選材　　計(jì)算機(jī)輔助命題　　難度控制　　樣本測(cè)試　　結(jié)果分析　　命題修正　　試題入庫(kù)　　試題生成　　個(gè)案跟蹤　　成績(jī)分析　　對(duì)比真題　　對(duì)比成績(jī)　　結(jié)果推論　　修正模型

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