COVID-19 is still spreading around the world.To fight the disease,scientists have developed different vaccines (疫苗) .By now,many people have gotten COVID-19 vaccines. (1) C Vaccines help teach the immune system (免疫系统) about what challenges might look like.They prepare the body to fig...
COVID-19 is still spreading around the world. To fight the disease, scientists have developed different vaccines (疫苗). By now, many people have gotten COVID-19 vaccines. 1 Vaccines help teach the immune system (免疫系统) about what challenges might look like. They prepare the body to...
—The year 2022 is ___ unusual one. Covid-19 is still spreading around the world. —The fight against the virus is like ___ race (竞赛) against time. A. a; an B. an; a C. a; a D. an; an 相关知识点: 试题来源: 解析 B 【...
D【解析】spreads蔓延,流传,一般现在时;is spreading蔓延,流传,现在进行时;was spread蔓延,流传,一般过去时;has spread 蔓延,流传,现在完成时。根据句中for nearly three years可知用动词的现在完成时,即have / has done。主语是COVID 19,助动词用has。故选:D。【思路点拨】新型冠状病毒已经在中国蔓延了近三年。
COVID-19 is still raging around the planet. Alarmed by this situation, we think more deeply about the relationship between humans and nature ahead of Earth Day, which falls on April 22. This year's Earth Day focuses on climate change. Scientists agree that climate change is causing a great...
根据COVID- 19(新冠肺炎)is breaking out around the world now"新冠肺炎现在在世界各地爆发"可知,它"扼杀"了我们重返学校的机会。用kills。故选:A.--新冠肺炎现在在世界各地爆发。--太可怕了!它扼杀了我们重返学校的机会。动词是表示动作或者是状态的词,要结合语境,辨析选项动词意思,选择合适答案完成试题。
解析 B 句意:由于新型冠状病毒仍在快速传播,接种疫苗是非常必要的。before在……之前;since由于;although尽管;unless除非。根据“ the COVID-19 is still spreading rapidly, getting a vaccine(疫苗) is quite necessary”可知,“新型冠状病毒仍在快速传播”是接种疫苗的原因,用since引导原因状语从句,故选B。
【题文】As COVID-19 is still spreading in many countries, quickly finding people who have the virus is very important. But COVID-19 is not easy to detect. Many people who catch the virus clearly show signs of being ill, like having a fever or coughing. But many others show no signs...
As COVID-19 is still spreading in many countries, quickly finding people who have the virus is very important. But COVID-19 is not easy to detect. Many people who catch the virus clearly show signs of being ill, like having a fever or coughing. But many others show no signs at all....
As COVID-19 is still spreading in many countries, quickly finding people who have the virus(病毒)is very important. But COVID-19 is not easy to detect(发现). Many people who catch the virus clearly show signs of being ill. But many others show no signs at all. These people are “as...