Ⅰ.流感预防冬季是流感的高发期,气温变化大,病毒容易传播。让我们一起做好防护,远离疾病吧!(有两项多余)
It's possible to fall ill at any time of the year, but winter seems to bring a big rise in sickness. We often think of the cold weather bringing us indoors as a big reason, but is that the only reason? 1.
B
.
It's certainly true that spending more time indoors can put us in close contact with others. As a result, the risk of catching a cold or flu will increase. However, there are other reasons. According to scientists, the flu virus is protected by a fatty coating(脂肪层) on the outside. This coating turns into liquid(液体) at higher temperatures. 2.
F
. In colder weather, however, the coating remains complete. When the virus comes in contact with the respiratory tract(呼吸道), it will enter our body easily.
That's not the only way viruses can get advantages from cooler temperatures. 3.
A
, both indoors and outside. The dry air is good for the spread of viruses. Therefore, viruses can travel farther and be in the air for longer. Besides, in winter, we often close our windows and doors to keep warm. Less fresh air indoors helps viruses live longer in a room.
What about other reasons? 4.
D
. It's easier to damage our immune systems(免疫系统). A recent study, published in The Journal of Allergy and Clinical Immunology, found that reducing the temperature inside the nose by 5℃ kills nearly 50% of its virus-fighting cells.
5.
G
. Washing our hands often can reduce the spread of viruses. Try to avoid sharing dishes or drinking glasses with others too. And don't forget to wear masks because they can stop most of viruses from entering the nose.
A. The air is drier in winter B. In fact, there is something else C. Warm weather does good to our body D. Cold weather may do harm to our body E. Yes, it's the main reason for colds or flu F. So the virus is less able to spread in summer G. We can use some healthy tips to prevent illnesses
