【正文】 l m onths before our tri p, Wang Wei and I went to the li brary. We found a large atlas wi th good m aps that showed detai ls of worl d geography. From the atl as we coul d see that the Mekong River begi ns in a glaci er on a Ti betan m ountai n. At first the ri ver i s sm al l and the water i s cl ear and col d. Then it begi ns to m ove qui ckl y. It be es rapi ds as i t passes through deep val leys, travel ing across western Yunnan Provi nce. Som etim es the ri ver be es a waterfal and enters wi de val eys. We were both surpri sed to l earn that hal f of the river i s i n Chi na. After i t l eaves Chi na and the high al ti tude, the Mekong be es wi de， brown and warm. As it enters Southeast Asi a, its pace sl ows. It m akes wi de bends or meanders through l ow val eys to the pl ai ns where ri ce grows. At last, the ri ver delta enters the South Chi na Sea. PART2 A NIGH T IN TH E MOUNTAINS Al though it was autum n, the snow was al ready begi nni ng to fal i n Ti bet. Our l egs were so heavy and col d that they fel t l i ke bl ocks of i ave you ever seen snowmen ride bicycl es?That’s what we l ooked l ike! Al ong the way chil dren dressed in long wool coats stopped to look at us. In the l ate afternoon we found i t was so col d that our water bottl es froze. However,the l akes shoneli ke gl ass i n the setti ng sun and looked wonderful . Wangwei rode in front of me as usual. She is very rel iabl e and I knew I didn’t need to encourage her. To cl im b the m ountai ns was hard work but as we l ooked around us, we were surprised by the vi ew. We seem ed to be abl e to see for mil es.i denti ty? O nl y tim e wi l tel. STAN DARD EN GLISH AN D DIALECTS What i s standard Engli sh? Is i t spoken in Bri tai n, the US, Canada, Australi a, Indi a and N ew Zeal and? Bel i eve it or not, there i s no such thi ng as standard Engli sh. Many peopl e beli eve the Engli sh spoken on TV and the radi o is standard Engli sh. Thi s i s because in the earl y days of radi o, those who reported the news were expected to speak excel ent Engli sh. H owever, on TV and the radi o you wil l hear differences i n the way peopl e speak. When people use words and expresions different from the “standard l anguage”, it is cal l ed a dial ect. American Engli sh has m any di alects, especi al y the Mi dwestern, southern, Afri can Am eri can and Spanish di alects. Even i n som e parts of the USA, two peopl e from nei ghbouri ng towns speak a li ttl e di fferentl y. Am eri can Engl ish has so m any di al ects because peopl e have e from al l over the worl d. Geography al so pl ays a part i n m aki ng di al ects. Some peopl e who l i ve i n the m ountai ns of the eastern USA speak with an ol der ki nd of Engli sh di al ect. When Am eri cans m oved from one pl ace to another, they took their di al ects wi th them . So peopl e from the m ountai ns i n the southeastern USA speak wi th alm ost the sam e di al ects as peopl e i n the northwestern USA. The USA i s a l arge country i n whi ch many di fferent di al ects are spoken. Al though m any Am eri cans m ove a l ot, they stil l recogni ze and understand each other’s dial ects. TH E O XFO RD EN GLISH DICTION ARY You may thi nk that Engl i sh dictionari es have been used for m any, m any centuri es. The spel i ng of Engli sh has al ways been a probl em but it was more of a probl em i n the days before a di ctionary. Then peopl e coul d spel l word i n different ways whi ch you mi ght fi nd i t i nteresti ng. But it m ade readi ng Engli sh m uch m ore di fi cul t. So di cti onari es were invented to encourage everybody to spel l the sam e. In fact, an Engli sh di cti onary l i ke the ki nd you use today wasn’t made until the time of the l ate Qing Dynasty. There men did most of the important earl y work on dicti onari es: Sam uel Johnson, N oah Webster, and Jam es Murray. These m en spent nearl y al of thei r li ves tryi ng to col l ect words for thei r dictionaries. For them, it wasn’t only a job。t know the best way of getti ng to pl aces, she i nsi sted that she ani ze the tri p properl y. N ow, I know that the proper way i s al ways her way. I kept aski ng her, When are we l eavi ng and when are we i ng back? I asked her whether she had l ooked at a m ap yet. O f course, she hadn39。 m y sister doesn39。 臨時(shí)道路設(shè)置 為了滿足施工材料的運(yùn)輸需要，工地需要修筑臨時(shí)道路，為了減少材料的浪費(fèi)，確保道路路基實(shí)度，故開工前應(yīng)結(jié)合永久的道路的設(shè)計(jì)標(biāo)高，提前將碎石墊層按設(shè)計(jì)要求鋪平壓實(shí)，表面再鋪瓜子片或粗砂做面層壓實(shí)，供施工時(shí)使用。 臨時(shí)排水網(wǎng)設(shè)置 根據(jù)現(xiàn)場實(shí)際情況，搞好排水網(wǎng)設(shè)計(jì)。 施工用水布置 施工用水分點(diǎn)設(shè)置供應(yīng)，如砼攪拌站，工地養(yǎng)護(hù)用水，生活區(qū)用水，消防用水進(jìn)行有計(jì)劃的分點(diǎn)供應(yīng)，并在主水管上設(shè)置總的水表，以確計(jì)量使用。 施工用電應(yīng)根據(jù)三相電路，基本做到平衡，由總配電箱分出，兩箱為動(dòng)力分配電箱，一箱為工地照明及生活照明分配電箱，并附設(shè)電表計(jì)量。了解設(shè)計(jì)意圖，對(duì)圖紙中的吊點(diǎn)、難點(diǎn)開展技術(shù)攻關(guān)，畫出大樣圖。 i denti ty? O nl y tim e wi l tel. STAN DARD EN GLISH AN D DIALECTS What i s standard Engli sh? Is i t spoken in Bri tai n, the US, Canada, Australi a, Indi a and N ew Zeal and? Beli eve it or not, there i s no such thing as standard Engli sh. Many peopl e bel ieve the Engl ish spoken on TV and the radi o i s standard Engli sh. Thi s i s because in the earl y days of radi o, those who reported the news were expected to speak excel ent Engli sh. H owever, on TV and the radi o you wil l hear di ferences i n the way peopl e speak. When peopl e use words and expressions different from the “standard l anguage”, it is cal l ed a dial ect. American English has many dial ects, especi al ly the Mi dwestern, southern, Afri can Am eri can and Spanish di al ects. Even i n som e parts of the USA, two peopl e from nei ghbouri ng towns speak a li ttl e di fferentl y. Am eri can Engl i sh has so many di al ects because peopl e have e from al l over the worl d. Geography al so pl ays a part i n m aki ng di al ects. Som e peopl e who l i ve in the m ountai ns of the eastern USA speak wi th an ol der ki nd of Engli sh di al ect. When Am eri cans m oved from one pl ace to another, they took thei r di al ects wi th them. So peopl e from the mountai ns i n the southeastern