大工13秋《测量学》在线作业3（Great works, 13 autumn, surveying, online homework, 3）.docVIP

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大工13秋《测量学》在线作业3（Great works, 13 autumn, surveying, online homework, 3）.doc

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大工13秋《测量学》在线作业3（Great works, 13 autumn, surveying, online homework, 3）

大工13秋《测量学》在线作业3（Great works, 13 autumn, surveying, online homework, 3） Great works, 13 autumn, surveying, online homework, 3 1. when surveying and mapping 1:1000 scale topographic map, the error of the flat panel instrument shall not be greater than (). A. 5mm B. 10mm C. 20mm D. 50mm The correct answer: D Full Score: 6 points: 6 2. rear intersection points, in order to avoid the danger point on the circle, can take measures (is). Close to 180 degrees to calculate the intersection angle alpha, beta and gamma of known point fixed angle and not A. B. marks three known points and points on the topographic map to see if it is on or near a circle C. adds fourth observation points to the point at which it is located D. or more is wrong The correct answer: B Full Score: 6 points: 6 3. the sign of the difference of the earths curvature, the correction of altitude difference, and the correction of the difference between the atmospheric refraction light difference and the height difference. A. +, + B. -, - C. -, + D. +, - The correct answer: D Full Score: 6 points: 6 4. in the topographic map, in order to determine the location of a mountain in Guta, when the inconvenience distance can be used (). A. forward intersection method B. lateral intersection method C. resection method D. polar coordinate method The correct answer: A Full Score: 6 points: 6 5. the calculation of average height from the edge, according to the calculation method (). A. to measure the height difference, the back difference is divided by 2 B. up and down elevation difference, take the average C. the absolute value of the elevation difference is taken as the symbol of the elevation difference D. the average difference between the round-trip and the average The correct answer: A Full Score: 6 points: 6 6., the coordinate azimuth angle AB is calculated by the coordinate of A and B two points plane. When the delta YAB is less than 0, and the delta XAB is 0, the azimuth of the line AB is the quadrant. A. I B.