A
Facts about novel corona virus: Prevention and control
* Keep distance with people when talking
The novel corona virus can be transmitted via droplets and fly 1 to 2 meters in the air before falling to the ground. Droplets can be transmitted far longer when sneezing and coughing than speaking, so apart from
keeping 1 to 2 meters of distance, also remember to wear a mask when you are close to someone else.
* Washing hands can reduce risk of getting infected
Please wash your hands promptly and properly after touching elevator buttons or using cash. Do not touch your nose or mouth or rub your eyes
before washing your hands. Do not use smart phones while eating.
* Receiving delivered packages at home not dangerous
Though the virus might be attached to the packaging of delivered items, the possibility of transmission through express delivery is extremely low.
Before going out to take your delivery, remember to wear a mask. After removing the packaging, please wash your hands.
* Sun exposure cannot kill the virus
The temperature of sun light cannot reach 56℃, and the ultraviole（t
紫外线）
rays in sunlight cannot reach the intensity of ultraviolet lamps, so the virus can’t be killed by the sunlight. If you want to go out to get some sun, please wear a mask and take other protective measures.
* Taking a hot bath or using air conditioning cannot kill the virus
Although the virus is vulnerable（脆弱的） to heat. It can only be after exposure to a 56°C temperature for over 30 minutes.
* Woolen fabric doesn’t retain virus longer
It is believed that the virus prefers smooth, non-porous surfaces and stays on woolen fabrics for a shorter time. At home or before going out, it is not necessary to consider which kind of material has less chance to absorb the virus—choosing comfortable clothes is enough.
After returning home, please wash your hands, sterilize the clothes and dry the clothes.
21. What are you suggested to do when taking delivered packages?
A. Wear a mask. B. Take a hot bath. C. Open packages. D. Dry the clothes.
22. According to the passage, the following sentences are right EXCEPT that .
A. the virus is vulnerable to heat
B. the virus can be transmitted via droplets
C. the virus prefers smooth, non-porous surfaces
D. the virus cannot be killed by the ultraviolet rays
23. We can probably read this passage from .
A. a textbook B. an advertisement
C. a travel brochure D. a science magazine
