2020中考英语新话题-新冠状病毒学案（教师版+学生版）

2020中考英语新话题-新冠状病毒学案 A. Listen and fill in the blanks In December 2019, there was a cluster of pneumonia cases in China. Investigations found that it was caused by a 1._____ 2._____ virus – now named the 2019 Novel Coronavirus. In this video, we’ll take a quick look at what’s 3. _____ known about the virus. Keep in mind that this is a new virus and what’s known about the virus now might 4. _____ in the future. Coronaviruses are a large 5._____of viruses. They 6._____ of a core of genetic material surrounded by an7. _____ with protein spikes. This gives it the 8._____ of a crown. Crown in Latin is called “corona” and that’s how these viruses get their name. There are different 9._____ of coronaviruses that cause respiratory and sometimes gastrointestinal symptoms. Respiratory disease can range from the common cold to pneumonia. And in most people, the symptoms10. _____to be mild. However, there are some types of coronaviruses that can cause 11._____ 12._____. These include the Severe Acute Respiratory Syndrome coronavirus first 13._____in China in 2003 and the Middle East Respiratory Syndrome coronavirus that was first identified in Saudi Arabia in 2012. The 2019 Novel Coronavirus was first identified in China. It 14._____ 15._____ in a group of people with pneumonia who’d been 16._____with a seafood and live animal market in the city of Wuhan. The disease has since17._____ from those who were sick to others, including family members and health care staff. There are many cases at 18._____ and the disease has spread within China and also to a number of other countries. So, where did the virus come from? It’s known that coronaviruses circulate in a range of animals. Sometimes these viruses can make the jump from animals to humans. This is called a spillover and could be due to a range of factors such as mutations in the virus or increased contact between humans and animals. For example, MERS-CoV is known to be transmitted from camels and SARS-CoV, from civet cats. The animal reservoir of the 2019 Novel Coronavirus is not known yet. How is it transmitted? The exact dynamics of how the virus is transmitted is yet to be determined. In general, respiratory viruses are usually transmitted through droplets created when an infected person coughs or sneezes, or through something that has been contaminated with the virus. People most at risk of infection from the Novel Coronavirus are those in close contact with animals, such as live animal market workers, and those who are caring for people infected with the virus, such as family members or healthcare workers. So, how does the disease present? Well, from what is known so far, there can be a number of symptoms ranging from mild to severe. There can be fever and respiratory symptoms such as cough and shortness of breath. In more severe cases, there’s been pneumonia, kidney failure, and death. The mortality rate is not known yet. How can we tell whether someone is infected? The infection ... ...