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位于同一鉛垂線上 5.當豎盤讀數(shù)為:81176。 B.1/3500 7.導線角度閉合差的調整方法是將閉合差反符號后(C )。D.距離交會二、多項選擇題1.測量的基本工作有(ABC )。A.高差 B.高程C.水平距離 D.高差與平距E.水平角5.附合導線坐標計算與閉合導線坐標計算不同點是(AD)。(√ )4.在水準測量中轉點的作用是傳遞距離。( )8.坡線是垂直于等高線的短線,用以指示坡度上升方向。表1:觀測次數(shù)觀測值LV″2分VV2分182176?!?82176。19′12″+981682176。已知:a1=90 176。00162。 178。一測回角值176。00 162。 11 178。其限度為:(1)在半徑為10km的測區(qū)范圍內進行距離測量時,可以用水平面面代替水準面,不考慮地球曲率對距離的影響;(2)地球曲率對高程測量的影響很大。點狀地物一般選擇其中心位置,線狀地物一般選擇其起、止點或轉折點和彎曲點。相鄰圖幅拼接時,用一透明紙蒙在左圖幅的接邊上,用鉛筆把其圖廓線、坐標格網(wǎng)線、地物、地貌繪在透明紙上,然后再將透明紙按相同圖廓線、坐標格網(wǎng)線蒙在右圖幅邊上,用同樣鉛筆描繪地物和地貌,取其平均位置作為最后相鄰圖幅的地物和地貌。②實地檢查是在室內檢查的基礎上進行實地巡視檢查和儀器檢查。整飾的順序是先圖內后圖外,先地物后地貌,先注記后符號。這些控制點精度高,均勻分布整個測區(qū)。2. 1:5000地形圖的比例尺精度是(D)。D 南西40176。B 經緯度8. 危險圓出現(xiàn)在(A)中。13.下面關于鉛垂線的敘述正確的是(A)。25 測量誤差按其對測量結果的影響性質,可分為系統(tǒng)誤差和__偶然誤差26 地物注記的形式有文字注記、_數(shù)字注記_和符號注記三種。28 經緯儀安置通常包括整平和對中。32.中誤差:是一個描述測量精度的指標,指的是在相同觀測條件下對同一未知量進行n 次觀測,所得各個真誤差平方和的平均值,再取其平方根,稱為中誤差。意義在于:保證全國統(tǒng)一坐標系統(tǒng)和高程系統(tǒng);使地形圖可以分幅測繪,減少誤差積累,保證測量成果精度。 37.要從地形圖中獲取某兩點A、B構成的直線的坐標方位角,簡述可以實現(xiàn)這一任務的兩種常用方法。正確高差為,觀測高差為當Sa=Sb時。40. 從圖上量得點M的坐標XM=, YM=;點A的坐標為XA=, YA=。經緯儀測繪法的實質是按極坐標定點進行測圖,觀測時先將經緯儀安置在測站上,繪圖板安置于測站旁,用經緯儀測定碎部點的方向與已知方向之間的夾角、測站點至碎部點的距離和碎部點的高程,然后根據(jù)測定數(shù)據(jù)用量角器(半圓儀)和比例尺把碎部點的位置展繪于圖紙上,并在點的右側注明其高程,再對照實地描繪地形。六、實踐操作題42.簡述測回法測水平角的主要步驟和相應的角度計算方法(假定觀測兩個方向)。 we need the courage to do it.His ments came hours after Fifa vicepresident Jeffrey Webb also in London for the FA39。s Premier League match at Chelsea on Sunday.I am going to be at the match tomorrow and I have asked to meet Yaya Toure, he told BBC Sport.For me it39。City39。s plaint. In a statement the Russian side added: We found no racist insults from fans of CSKA.Baumgartner the disappointing news: Mission aborted.The supersonic descent could happen as early as Sunda.The weather plays an important role in this mission. Starting at the ground, conditions have to be very calm winds less than 2 mph, with no precipitation or humidity and limited cloud cover. The balloon, with capsule attached, will move through the lower level of the atmosphere (the troposphere) where our daytoday weather lives. It will climb higher than the tip of Mount Everest ( miles/ kilometers), drifting even higher than the cruising altitude of mercial airliners ( miles/ kilometers) and into the stratosphere. As he crosses the boundary layer (called the tropopause),e can expect a lot of turbulence.The balloon will slowly drift to the edge of space at 120,000 feet ( Then, I would assume, he will slowly step out onto something resembling an Olympic diving platform.Below, the Earth bees the concrete bottom of a swimming pool that he wants to land on, but not too hard. Still,