【正文】 re terrain or heavy ，110千米每小時應(yīng)該作為高速公路主干道的設(shè)計速度，但是在崎嶇的地區(qū)或者施工難度大的地區(qū)可能需要降低。The higher design speeds(設(shè)計速度)used for freeways result in long sight distances(視距)due to long radiushorizontal curves and long vertical curves, and otherdesirable design features that create a safe ， most of the nation’s freeways enjoy thisrelatively high level of design and safety, there are many opportunities for further ，但還是有很多地方需要進一步增強。1System design Run environment of systemThe running environment of intelligent C language examination system, which is according to our schoolstaff of educational technology center puter room of existing hardware environment(There are around fifty students machine terminal and a teacher machine terminal in the machine room)to be planned in present teacher machine terminal and students machine terminal adopt Window XP operating mode of LAN is used in each 6 is widely used in development tools, The database uses Access The choice of system operating modeB/S and C/S structure in the two sort of modes is very popular in the , the client does need not to install the software, so it has important significance in the examination system of the distance the data security is low, and high demands on the server, which the data transmission speed is C / S structure is a traditional structure, which has proven technique, high security, low network traffic and fast response to our school room hardware and software conditions and the C language intelligent examination system ,which is to meet their own needs when selecting C / S structure of the system design.第二篇：專業(yè)英語翻譯Freeways,especially those built to Interstate standardsare the safest of the various classes of , control of access, which limits vehicle conflicts(車輛沖突), isa primary factor in relatively low accident, injury,and fatality rates(事故,死亡率), other design features, such as wide medians and shoulders roadsides clear of obstructions, and the extensive use of protective barriers(護欄), are key factors as ，是獲得較低的交通事故率和傷亡率的一個主 要因素。而C /S結(jié)構(gòu)是傳統(tǒng)的結(jié)構(gòu)，技術(shù)非常成熟，安全性較高，網(wǎng)絡(luò)通信量低，響應(yīng)速度快?？蛻舳瞬恍枰惭b軟件，只要有IE就可以運行，故它在遠程教育的考試系統(tǒng)中具有重要意義。1．2系統(tǒng)運行模式的選擇當(dāng)前流行B/S和C/S這兩種模式結(jié)構(gòu)。每個機房都采用工作組模式組成局域網(wǎng)。第一篇：專業(yè)英語翻譯系統(tǒng)設(shè)計1．1 系統(tǒng)的運行環(huán)境智能Ｃ語言考試系統(tǒng)的運行環(huán)境是根據(jù)我校教育技術(shù)中心的機房現(xiàn)有的硬件環(huán)境（每個機房有五十臺左右的學(xué)生機和一臺教師機）規(guī)劃的。教師機端和學(xué)生機端都采用Window XP操作系統(tǒng)。開發(fā)工具采用VB ，數(shù)據(jù)庫采用Access 2000。B/S結(jié)構(gòu)是隨Internet發(fā)展而來的。但是它數(shù)據(jù)安全性較低，對服務(wù)器要求高，數(shù)據(jù)傳輸速度也慢。根據(jù)我校機房軟硬件條件及Ｃ語言智能考試系統(tǒng)自身的需要，選擇C/S結(jié)構(gòu)進行系統(tǒng)設(shè)計。另外，其他的設(shè)計特性，如較寬的中央分隔帶和較寬的路肩、路邊無障礙物、大量采用防護欄等也是關(guān)鍵要素。Safety improvements on freeways can also result in substantial savings in life and property(生命和財產(chǎn))because freeways carry 25 percent of the nation’s total ，還會節(jié)約大量的生命財產(chǎn)資源，因為高速公路流量占了全國的總流量的25﹪。For reconstruction, rehabilitation, and resurfacing(3R)projects, the design speed should not be less than the original design speed or the current legal speed limit of that highway ，恢復(fù)鋪新路面工程，設(shè)計速度不應(yīng)該低于平時設(shè)計速度或者那塊交通干線區(qū)域的目前規(guī)定的速度限制。Usually, the design speed is established by the most restrictive element of the ramp, typically, the sharpest curve（小半徑曲線）.通常，這個設(shè)計速度被匝道的最限制的范圍，典型的是小半徑曲線。Safe and efficient traffic operations depend on adequate laneand shoulder widths as outlined in A Police on Geometric Design of Highways and 《道路的幾何尺寸的規(guī)定》設(shè)計的適當(dāng)?shù)男熊嚲€和路肩寬度。Any proposed use of lessthanfullstandard crosssection must be analyzed carefully on a sitebysite indicates that lane can operate safely if there are no other lessthanstandard features。經(jīng)驗表明，不考慮其他低于標(biāo)準(zhǔn)的因素，米得行車道寬足夠保證安全。Converting shoulder to travel lanes for additional capacity through a short bottleneck