题型：阅读理解 题类：常考题 难易度：普通
山西省临汾市第一中学2017-2018学年高一下学期英语第二次阶段性考试试卷
It used to be mostly the military that used small, unpiloted aircraft, called “drones.” The little planes were very costly. But as they have dropped in price more people have begun to use them. Rescue workers and farmers are among the new users. Moviemakers are using drones to film from the sky. Historians use them when they explore ancient buildings. Rescue workers use them to look for people. And now farmers are using them to watch over their crops.
Romain Faroux is a French businessman who starts companies. His father was a farmer. He believed drones could help farmers. He helped create a company that developed a small drone that could be controlled by people on the ground. They called it “Agridrone.” It uses a special “optical sensor” to examine crops. He says the technology used is similar to that used by smartphones-except it has wings.
A computer program directs the drone to fly over the crops. The sensor on the drone records four different-colored “bands” of sunlight that are reflected off the crops.
Jean-Baptiste Bruggeman is a farmer. He says the drone flies over his crops at different times of the season. He says this provides a lot of information about his crops. He says the drone pictures show him the exact amount of fertilizer the crops need. He says it also shows exactly where the fertilizer is needed. Some areas of a field may need more than others.
As a result, Mr. Bruggeman says there is reduced nitrogen from the fertilizer after the harvest. This helps nature. Romain Faroux says farmers use information gathered by the Agridrone to place fertilizer only in areas where it was needed. Before they used the drones, farmers would put the same amount of fertilizer everywhere.
Drones also save time because farmers can examine up to three hectares in about a minute.
What is the main idea of the passage?
试题篮
