The big advantage to using an unmanned drone (无人机)    1     (be) that the drone can be sent into dangerous locations. Drones have stepped forward as efficient tools in taking up tasks，    2     (include) checking body temperatures and spraying (喷洒)disinfectant (消毒剂) during the novel coronavirus epidemic (新冠病毒疫情) in China. A picture     3     (take) by Xinhua News Agency showed an operator using his drone to check    4    temperatures of residents in a community in Yichun, Jiangxi province, on Jan 29.

The drone, equipped with a special camera    5    a loudspeaker, can detect people    6    fever at a certain distance and broadcast messages about protective measures to residents, a Xinhua report said. That way, the spread of the virus could     7     (prevent), it said, since people did not need to be in close contact.

In other places, drones are being used to check for any behavior     8     might contribute to the spread of the virus, such as people not wearing     9    (mask ) in public.

The scientists said the new technology can be     10     (wide) applied and is ready for more fields in the future.

It was not until the outbreak of COVID-19 that people became     1     (full) aware of the importance of     wearing masks. However, few people know that masks     2     (invent) by Dr. Wu Lien Te, a distinguished medical expert in China. In the fight against the Manchurian plague (瘟疫), Wu made a great difference by taking effective measurements, such as masks, to control the infection with great caution. Dr. Wu,     3     was nominated (提名) for the Noble Prize in Medicine in 1935, set the standard for generations of doctors to follow.