Two new methods for surveying the location of graded contour banks for runoff control systems are described and compared. One method uses a Iaser surveying system and the other survey method uses a mobile electronic staff. Both methods are faster and more accurate than conventional surveying using ...
【题文】Farmers use different kinds of soil conservation methods to protect their land from damage by farming and the forces of nature . One important form of soil conservation is the use of windbreaks . Windbreaks are barriers formed by trees and other plants with many leaves . Farmers plant...
after;they won’t C.in;they aren’t D.in; there won’t25.Robot ___ more heavy work for us in the future . A.will do B.did C.have done D.were doing 4Farmers use different kinds of soil conservation methods to protect their land from damage by farming and the forces of nature...
根据第一段最后一句One important form of soil conservation is the use of windbreaks 可推断,风障是保护土壤最好的方法之一,故A描述正确;根据第二段最后一句They are very important for growing grains, such as wheat.直接判断B描述准确;由最后一段第一句There should be at least two lines in each ...
【题目】BFarmers use different kinds of soil conservation methods to protect their land fromdamage by farming and the forces of nature. One importantform of soi conservation is the useof windbreaks.Windbreaks are barriers formed by trees and other plants with many leaves. Farmers plantthem in ...
Farmers use different kinds of soil conservation methods to protect their land from damage by farming and the forces of nature . One important form of soil conservation is the use of windbreaks . Windbreaks are barriers formed by trees and other plants with many leaves . Farmers plant them in...
Farmers use different kinds of soil conservation methods to protect their land from damage by farming and the forces of nature . One important form of soil conservation is the use of windbreaks . Windbreaks are barriers formed by trees and other plants with many leaves . Farmers plant them in...
Different kinds of soil conservation methods are used by farmers to protect their land from damage by farming and the forces of nature. One important form of soil conservation is the use of windbreaks. Windbreaks are barriers (屏障) formed by trees and other plants with many leaves. Farmers pl...
Farmers use different kinds of soil conservation methods to protect their land from damage by farming and the forces of nature . One important form of soil conservation is the use of windbreaks . Windbreaks are barriers formed by trees and other plants with many leaves . Farmers plant them in...
Farmers use different kinds of soil conservationmethods to protect their land from damage by farmingand the forces of nature. One important form of soil con-servation is the use of windbreaks(防风林).Windbreaks are barriers formed by trees and otherplants with many leaves. Farmers plant them in...