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。
—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 【...
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...
For 2021, there's only one issue that will matter for higher education: COVID. The pandemic is impacting every aspect of higher education, including technology, curriculum, learning, grades, COVID testing, campus safety, mental health, enrollment, mergers, closures, layoffs, and fundraising.doi:...
The COVID-19 virus is still spreading around the world. It hangs over all of us. But some good news about vaccines for COVID-19 is bringing us closer to ending this terrible disease. On Dec. 8, 2020, in the UK a vaccine made by the US Pfizer and the German BioNTech came out. In...
Management of the COVID-19 pandemic has proven to be a significant challenge to policy makers. This is in large part due to uneven reporting and the absence of open-access visualization tools to present local trends and infer healthcare needs. Here we report the development of CovidCounties....
The World Health Organization (WHO) on Monday warned that the new coronavirus pandemic is still worsening globally, despite reductions in infections and deaths across Europe. Around the world, the coronavirus has killed more than 400,000 people, with the toll rising by thousands every day. The...
“The adjustment does not mean the COVID-19 outbreak is over. China will continue to protect vulnerable groups, especially seniors, and step up efforts to vaccinate them... as the latter has proven effective in preventing severe illness and death,” said
这句英文可以翻译成：COVID-19 是糖尿病病例增加的原因吗？COVID-19 也就是新型冠状病毒肺炎，简称 ...
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...