结果1 题目 (C)9. In the past drones(无人机)in the military while they have come in use for many business purposes. A. have been used B. had been used C. were used h D. are used 相关知识点: 试题来源: 解析 答案见上 反馈 收藏 ...
解析 In the past, drones were used in the military while they have come in use for many business purposes. 1. 句子前半部分“In the past...”表示过去的时间,应该用过去式。 2. drones 与 use 之间是被动关系,应该用被动语态。 3. 因此,空格处应填入过去式的被动语态,即“were used”。
In the past,they were mostly used in the military (军事). But as they have d82 in price more people have begun to use them. Rescue workers and fanners are among the newusers.A company in France is using drones to help farmers examine their crops and limit theamount of fertilizer (...
military drones 据我所知是军用无人驾驶飞机的意思 人驾驶飞机简称“无人机”，是利用无线电遥控设备和自备的程序控制装置操纵的不载人飞机。机上无驾驶舱，但安装有自动驾驶仪、程序控制装置等设备。地面、舰艇上或母机遥控站人员通过雷达等设备，对其进行跟踪、定位、遥控、遥测和数字传输。可在无线电...
action limitations, create problems, restrict use, and decrease target effectiveness.#Additionally, the paper analyzes the role and impact of Kamikaze drones in military operations in the current integrated and cybernetic battlefield, highlighting their ability to precisely target and surprise the enemy....
Social issues surrounding the use of drones include the effects that drones have on both subjects (operators, institutions, and targets), and objects of US national security, and the way the US organizes military and intelligence agencies to participate in the process of conflict. 展开 ...
jan. 5, 2021, at 7:03 a.m. save comment more iran tests drones in military exercise more reuters drones are seen during a large-scale drone combat exercise of army of the islamic republic of iran, in semnan, iran january 4, 2021. picture taken january 4, 2021. iranian army / wana ...
根据第一段中“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. (过去主要是军队使用的小型无人驾驶飞机,称为“无人机”。这种小飞机非常昂贵。
___through flight programs in their systems.The little planes used to be very costly.In the past,they were mostly used in the military (军事).But as they have d(82)___ in price more people have begun to use them.Rescue workers and farmers are among the new users.A company in ...
Unmanned aerial vehicles (UAVs) have turned out to be the brightest spot in the global military/aerospace sector in the past decade, opening up a huge opportunity for the development of not only new types of pilotless aircraft but also a broad array of new and very technically sophisticated ad...