A: It's a serious public-health threat, like the flu, and we should be cautious, but not alarmed.
B: The virus affects people of all ages equally. There is no cure and it is very difficult to fight off the virus.
举一反三
- The AIDS virus suppresses the body's ability to fight off simple ailments like the common cold. A: inhibits B: exhausts C: depresses D: proliferates
- l What is coronavirus? This is a very large outbreak. This is Dr. Bill Schaffner, I’m an [1] isease specialist and public health person. Coronaviruses are a whole family of viruses. For the most part, they don’t cause any real clinical illness except the [2] . But you know, from time to time, there’s a rogue coronavirus that develops. We remember SARS 2002, 2003. And then there was another, the MERS virus, the Middle East Respiratory Syndrome virus. This new virus, like those other rogue viruses, probably was first [3] to humans from animals.
- The AIDS virus supresses the body’s ability to fight off simple ailments like the common cold.➡️ supresses? A: inhibits B: exhausts C: depresses D: proliferates
- The flu is a highly (1) respiratory illness. It turns up year after year with devastating consequences, all caused by a most elusive virus. The influenza, or flu virus, is a recurring nightmare. It causes more than 36,000 deaths in the U.S each year, and was responsible for some of history’s deadliest pandemics. Like other viruses, the flu virus is a parasite. The viral agent itself called, a virion, is made of ribonucleic acid or RNA surrounded by proteins. The flu virus uses two proteins to attack its host, hemagglutinin and neuraminidase or the HA and NA proteins. The HA protein attaches a virus to a cell and lets it in. Once the virus is inside, it multiplies. Then the NA protein cuts this (2) swarm loose, sending it off to infect more cells. This triggers the immune system to bombard the swarm and to destroy infected tissue throughout the respiratory system. Unfortunately, this response can also inadvertently lead to death through organ failure or secondary infections like (3) pneumonia. The flu virus has been nearly impossible to eradicate, largely due to its uncanny ability to mutate. Since just 2004, more than 5,000 different strains of the influenza virus have been sequenced. Those that affect humans are categorized as Types A, B or C, with Type A strains being the most capable of unleashing a pandemic. Influenza A viruses mutate more rapidly, allowing them to adapt to new hosts and even cross species. Avian flu and Swine flu, for instance, are two strains of Type A viruses that through mutations, can be transmitted from birds and pigs to humans. One of the deadliest flu (4) was caused by one such virus. Between 1918 and 1919, the Spanish flu infected a third of the global population and killed up to 50 million people worldwide. Called H1N1, this particular strain of virus likely came from birds. The threat of another influenza pandemic remains. In the meantime, scientists are constantly monitoring the flu virus and developing seasonal (5) to create our best line of defense.
- People are concerned about the environment issue because air and water pollution not only affects everyone’s health but also makes it difficult for businesses to ______.
内容
- 0
The sentence “I’ll fight anyone who will sit down with me! (Para. 9)” is closest in meaning to ______. A: “Nobody should sit down, or I’ll fight him!” B: “Stop fighting! Everybody should sit down!” C: “I’d like to fight somebody, but we will sit down to fight!” D: “Everyone should sit down and fight me!”
- 1
When writing a cause and effect essay, we should treat all the causes and effects equally.
- 2
听看完视频，完成填空。每空一词Fight the VirusHello virus from WuhanAnother problem is（1）againBecause you see the contagion creepingAnd the（2）is indeed spreadingAnd the memory of SARS plantedin my brainStill remainsWe stand and（3）the virusWe hear of theories how it grewFrom snakes and bats became a（4）Passing the sickness from man to manNow it’s growing,Getting out of（5）It’s a virus that has traveled near and farCoronaWe have to fight the virusAnd in the latest（6）I sawTen thousand people may be morePeople falling sick with much（7）People falling ill with much sneezingPeople worried for their（8）and their ones so dearPneumoniaWe keep the fight the virusKeep your（9）clean always knowHygiene will stop that virus growWhen you sneeze cover with a（10）Even coughing just let me teach youWear a（11）if you’re sickSo that others won’t get it tooWe（12）on youTo help to fight the virusTogether we must（13）To beat the virus fight as oneFor a life of health and（14）It’s in our hands it’s up to you and meFor the health of our（15）Of our friends and familyHumanityWe will win thisFight the virus
- 3
In the sentence, “Never too busy for the wonder and the awe of life”(Paragraph 8) , the author tries to tell us that ____. A: we should respect and embrace every moment of our life B: we should enjoy our life to the most C: we should be very cautious about our life D: we should feel amazed and thankful for the life
- 4
All the people in the world should work together to fight against AIDS.