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...
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...
【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...
COVID-19 is still spreading around the planet. This year’s Earth Day focuses on climate (气候) change. Scientists agree that climate change is causing harm to the world in the form of bad weather and natural disasters. Will climate change lead to more disease outbreaks in the future? The...
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。
—We'd better not go abroad, when COVID-19 is still spreading around the world. —You're right.( ) A. especially B. certainly C. properly D. differently 相关知识点: 试题来源: 解析 A [解析]especially尤其;certainly当然;properly正确地;differently不同地。根据"我们最好不要出国,...当新冠...
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...
句意:由于COVID-19仍在一些地方传播,接种疫苗是非常必要的。before 在……以前,引导时间状语从句;although 尽管,引导让步状语从句;since 由于,引导原因状语从句; unless 除非,如果不,引导条件状语从句。分析句子可知,根据“the COVID-19 is still spreading in some places, getting a vaccine (疫苗) is quite ...
___ the COVID-19 is still spreading rapidly, getting a vaccine(疫苗) is quite necessary.A.BeforeB.SinceC.AlthoughD.Unless相关知识点: 试题来源: 解析 【答案】 B 【解析】 句意:由于 COVID-19 仍在迅速传播,接种疫苗是非常必要的。 考查连词辨析。 A. before 在……以前,引导时间状语从句; B. ...
The COVID-19 is still spreading rapidly.We'll be at the risk of catching the virus we get a vaccine(疫苗).( )A. if B. unless C. when D. whether 相关知识点: 试题来源: 解析 B 经分析可知题干是一个主从复合句,空格上需填一个适当的连词构成从句并使主、从句在意思和语法上都正确。if...