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請寫出 Java 語言中標識符的命名規則。

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正確答案:

標識符是由字母、數字、下劃線或美元符組成的寧符串 ,其中數字不能作為,標識符的開頭,并區分大小寫。

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某水庫樞紐工程有主壩、副壩、溢洪道、電站及灌溉引水隧洞等建筑物組成,水庫總庫容 5.84x108m3,電站裝機容量6.0MW,主壩為粘土心墻土石壩最大壩高90.3 米,灌溉引水洞引水 流量 45m3/s,溢洪道控制段共5 孔,每孔凈寬 15 米,程施工過程中發生如下 事件: 事件一:為加強工程施工安全生產管理,根據《水利工程施工安全管理導則》 (SL721-2015 )第 14 頁 共 21 頁等有關 規定,項目法人組織制定了安全目標管理制度,安全設施“三同時”管理制度等多項安全生產管理制度并對施工單位安全生產許可證,三類人員安全生產考核合格證及特種作業人員持證上崗等情況進行核查。 事件二:工程開工前,施工單位根據《水電水利工程施工重大危險源辨識及評價導則》(DL/T5274~2012),對各單位工程的重大危險源分別進行了辨識和評價,通過作業條件危險性評價,部分單位工程危險性大小值及事故可能造成的人員傷亡,數量和財產損失情況如下: 主壩: 危險性大小值 D 為 240 ,可能造成 10 ~20 人死亡,直接經濟損失,2000~3000萬元, 副壩:危險性大小值 D 為 120 ,可能造成 1 ~2 人死亡,直接經濟損失,200~300萬元, 溢洪道:危險性大小值D 為 270 ,可能造成 3 ~5 人死亡,直接經濟損失,300~400 萬 引水洞: 危險性大小值 D 為 540 ,可能造成 1 ~2 人死亡, 直接經濟損失, 1000~1500 萬元 事件三:電站基坑開挖前,施工單位編制了施工措施計劃部分內容如下: (1)施工用電有系統電網接入,現場安裝變壓器一臺; (2)基坑采用明挖施工,開挖深度95 米,下部巖石采用爆破作業,規定每次裝藥量不得大于 50kg ,雷 雨天氣禁止爆破作業; (3)電站廠房墩墻采用落地式式鋼管腳手架施工,墩墻最大高度26m ; (4)混凝土澆筑采用,塔式起重機進行垂直運輸,每次混凝土運輸量不超過6m3,并要求風力超過 7 級暫停施工。 【問題】 1. 指出本水庫樞紐工程的等別、電站主要建筑物和臨時建筑物的級別,以及本工程施工項目負責人應具有的建造師級別。 2. 根據《水利工程建設安全生產管理規定》(水利部令第 26 號)和《水利工程施正安全管理導 則》(SL721-2015 ),說明事件一中“三類人員”和“三同時”所代表的具體內容。 3. 根據《水電水利工程施工重大危險源辨識及評價導則》(DL/T5274-2012 ),依據事故可能造成人員傷亡數量及財產損失情況,重大危險源共劃分為幾級?根據事件二的評價結果分別說明主壩、副壩、溢洪道、引水洞單位工程的重大危險源級別。 4. 根據《水電水利工程施工重大危險源辨識及評價導則》(DL/T5274-2012 ),在事件三涉及的生產、施工作業中,宜列入重大危險源重點評價對象的有哪些?
試題分類: 一級建造師
練習次數:1次
If the old maxim that the customer is always right still has meaning, then the airlines that ply the world’s busiest air route between London and Paris have a flight on their hands. The Eurostar train service linking the UK and French capitals via the Channel Tunnel is winning customers in increasing numbers. In late May, it carried its one millionth passenger, having run only a limited service between London, Paris and Brussels since November 1994, starting with two trains a day in each direction to Paris and Brussels. By 1997, the company believes that it will be carrying ten million passengers a year, and continue to grow from there. From July, Eurostar steps its service to nine trains each way between London and Paris, and five between London and Brussels. Each train carries almost 800 passengers, 210 of them in first class. The airlines estimate that they will initially lose around 15%-20% of their London-Paris traffic to the railways once Eurostar starts a full service later this year (1995), with 15 trains a day each way. A similar service will start to Brussels. The damage will be limited, however, the airlines believe, with passenger numbers returning to previous levels within two to three years. In the short term, the damage caused by the 1 million people-levels traveling between London and Paris and Brussels on Eurostar trains means that some air services are already suffering. Some of the major carriers say that their passenger numbers are down by less than 5% and point to their rivals-Particularly Air France-as having suffered the problems. On the Brussels route, the railway company had less success, and the airlines report anything from around a 5% drop to no visible decline in traffic. The airlines’ optimism on returning traffic levels is based on historical precedent. British Midland, for example, points to its experience on Heathrow Leeds Bradford service which saw passenger numbers fold by 15% when British Rail electrified and modernized the railway line between London and Yorkshire. Two years later, travel had risen between the two destinations to the point where the airline was carrying record numbers of passengers. 1.British airlines confide in the fact that__. A.they are more powerful than other European airlines. B.their total loss won’t go beyond a drop of 5% passengers. C.their traffic levels will return in 2-3 years. D.traveling by rail can never catch up with traveling by air. 2.The author’s attitude towards the drop of passengers may be described as__. A.worried.B.delightedC.puzzled.D.unrivaled. 3.In the passage, British Rail (Para 6) is mentioned to__. A.provide a comparison with Eurostar. B.support the airlines’ optimism. C.prove the inevitable drop of air passengers. D.call for electrification and modernization of the railway. 4.The railway’s Brussels route is brought forth to show that__. A.the Eurostar train service is not doing good business. B.the airlines can well compete with the railway. C.the Eurostar train service only caused little damage. D.only some airlines, such as Air France, are suffering. 5.The passage is taken from the first of an essay, from which we may well predict that in the following part the author is going to__. A.praise the airlines’ clear-mindedness. B.warn the airlines of high-speed rail services. C.propose a reduction of London/Paris flights. D.advise the airlines to follow British Midland as their model.
試題分類: 大學英語六級
練習次數:8次
Part III Cloze Directions: There are twenty blanks in the following passage. For each blank there are four choices. Choose the one that best fits into the passage and then marks your answer on the Answer Sheet. There are two factors which determine an individual’s intelligence. The first is the sort of brain he is born 61 . Human brains differ considerably, 62 being more capable than others. 63 no matter how good a brain he has to begin with, an individual will have a low order of intelligence 64 he has opportunities to learn. So the second factor is what 65 to the individual—the sort of environment in which he is brought 66 . If an individual is handicapped (受阻礙) 67 , it is likely that his brain will 68 to develop and he will 69 attain the level of intelligence of which he is 70 . The importance of environment in determining an individual’s intelligence can be 71 by the case history of the identical twins, Peter and John. When the twins were three months old, their parents died, and they are placed in 72 foster (寄養) homes. Peter was reared by parents of low intelligence in an 73 community with poor educational 74 . John, 75 , was educated in the home of well-to-do parents who has been to college. This environmental 76 continued until the twins were 77 their late teens, 78 they were given tests to 79 their intelligence. John’s I.Q. (智商) was 125, twenty-five points higher than the 80 and fully forty points higher than his identical brother. 61. A. for B. by C. with D. in 62. A. most B. some C. many D. few 63. A. But B. For C. Still D. And 64. A. if B. thought C. as D. unless 65. A. refers B. applies C. happens D. concerns 66. A. about B. up C. forward D. forth 67. A. relatively B. intelligently C. regularly D. environmentally 68. A. fail B. help C. manage D. stop 69. A. ever B. never C. even D. nearly 70. A. able B. capable C. available D. acceptable 71. A. demonstrated B. denied C. neglected D. ignored 72. A. separate B. similar C. remote D. individual 73. A. omitted B. isolated C. enclosed D. occupied 74. A. possibilities B. opportunities C. capacities D. responsibilities 75. A. moreover B. consequently C. then D. however 76. A. exception B. division C. difference D. alteration 77. A. in B. by C. at C. for 78. A. while B. since C. when D. because 79. A. estimate B. count C. decide D. measure 80. A. average B. common C. usual D. ordinary
試題分類: 大學英語六級
練習次數:0次
某賓館裝修改造項目采用工程量清單計價方式進行招投標,該項目裝修合同工期為3 個月,合同總價為 400 萬元,合同約定實際完成工程量超過估計工程量15% 以上時調整單價, 調整后的綜合單價為原綜合單價的 90% 。合同約定客房地面鋪地毯工程量為3800m2 ,單價為 140 元/m2; 墻面貼壁紙工程量為7500m2 ,單價為 88 元/m2 。施工過程中發生以下事件; 1.裝修進行 2 個月后,發包方以設計變更的形式通知承包方將公共走廊作為增加項目進行裝修改造。走廊地面裝修標準與客房裝修標準相同,工程量為 980m2; 走廊墻面裝修為高級乳膠漆, 工程量為 2300m2 ,因工程量清單中無此項目,發包人與承包人依據合同約定協商后確定的乳膠漆的綜合單價為l5 元/m2 。 2.由于走廊設計變更等待新圖紙造成承包方停工待料5d ,造成窩工 50 工日 (每工日工資 20 元)。 3.施工圖紙中浴廁問毛巾環為不銹鋼材質,但由發包人編制的工程量清單中無此項目,故承包人投時未進行報價。施工過程中,承包人自行采購了不銹鋼毛巾環并進行安裝。工程結算時,承包人按毛巾環實際采購價要求發包人進行結算。 問題: 1.因工程量變更,施工合同中綜合單價應如何確定? 2.客房及走廊地面、墻面裝修的結算工程款應為多少? 3.由于走廊設計變更造成的工期及費用損失,承包人是否應得到補償? 4.承包人關于毛巾環的結算要求是否合理?為什么 ?
試題分類: 一級建造師
練習次數:2次
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