Question

    What can drones do? Their many uses include taking pictures from the sky, observing（观察）wild animals and delivering packages. Now these small flying robots are leading a new farming revolution（革命）, according to the Food and Agriculture Organization of the United Nations.

When equipped（装备）with cameras and other data-gathering devices, drones provide us with an eye in the sky. Here are a few of the farming-related jobs drones can do.

Looking for sick crops

Drones can scan（扫描）crops using different kinds of light. Then, they produce multispectral images（多谱图像）that can help us find sickly yellow plants within fields of green. Drones can also detect bacteria（检测细菌）that are harmful to crops in the air from a few kilometers away. Farmers can check the drones’ air samples（样本）and try to find ways to protect their crops before the bacteria get to them.

Counting cattle

When flying over cattle, drones can track the livestock and find out where fences need fixing. People can also equip drones with thermal imagers（热像仪）and night-vision cameras. This can help farmers look for animals that could harm their cattle.

Water watch

Most fields aren’t perfectly flat（平坦的）. After watering, some places may dry out faster than others. Other spots might not get water at all. Drones can scan the field and make a 3-D map. Using the map, farmers can figure out which parts of a field are dry or need improvement.

Spraying pesticide（喷洒农药）

Different parts of a field might be uneven or have different altitudes（高度）. Drones can check for this when flying above the land. Then, they change their height and therefore spray the correct amount of pesticide over each part of the field. This is more efficient than traditional pesticide spraying. Drones can finish spraying a field up to five times faster than with traditional machinery, according to a study from MIT.

1.What can drones do to help farmers with their farming?

A.Take pictures. B.Look at wild animals. C.Deliver packages. D.Look for sick crops.

2.What do drones need to help guard cattle at night?

A.Wooden fences. B.Air samples. C.Night-vision cameras. D.3-D printers.

3.What does the underlined word “uneven” probably mean?

A.不肥沃的 B.不相连的 C.不平衡的 D.不平坦的

4.What do we know from the story?

A.Drones can’t detect bacteria unless crops are sick.

B.Drones can fight dangerous animals.

C.Drones can help farmers make sure fields are properly watered.

D.Drones are better at spraying pesticide over flat land.

Answer

1.D

2.C

3.D

4.C

【解析】

本文主要讲了无人机在农业方面的四大作用，无人机可以寻找生病的庄稼，数牛，监测水以及喷洒农药。

1.

推理判断题。根据文章内容，无人机在农业方面有四大作用：Looking for sick crops，Counting cattle，Water watch and Spraying pesticide，结合选项可知D选项正确。故选D。

2.

细节理解题。根据文中第六段“People can also equip drones with thermal imagers（热像仪）and night-vision cameras. This can help farmers look for animals that could harm their cattle.”可知，人们可以为无人机配备热像仪和夜视相机， 这样可以帮助农民寻找可能伤害他们牛的动物，所以可以配备夜视相机来看守他们的牛。故选C。

3.

词义猜测题。根据后面“or have different altitudes或者有不同的高度”及“they change their height and therefore spray the correct amount of pesticide over each part of the field. 他们改变高度，因此在每一块田地喷洒正确数量的农药。”结合选项可知，uneven应该意为“不平坦的”。故选D。

4.

推理判断题。根据文中“Drones can also detect bacteria（检测细菌）that are harmful to crops in the air from a few kilometers away.”可知，无人机还可以从几公里外的空气中检测到对作物有害的细菌，故选项A错误；通过文中第六段内容“This can help farmers look for animals that could harm their cattle”可知无人机可以帮助农民寻找可能伤害他们牛的动物，并不是与之作斗争，故选项B错误；根据文中第八段内容“Drones can scan the field and make a 3-D map. Using the map, farmers can figure out which parts of a field are dry or need improvement.”可知，无人机可以扫描现场并制作三维地图，利用地图，农民可以找出一块田地的哪些部分是干的或需要改进的，故选项C正确；根据文中最后一段“they change their height and therefore spray the correct amount of pesticide over each part of the field.”可知，无人机在不平坦的田地里喷洒农药更有优势，故选项D错误。故选C。