The flu is believed ______ by viruses that li...

The flu is believed ______ by viruses that like to reproduce in the cells inside the human nose and throat.

A. to be caused                   B. to have caused               C. being caused                   D. causing

高三英语单项填空中等难度题查看答案及解析

The flu is believed ________ by viruses that like to reproduce in the cell inside the human nose and throat.

A．causing　　 B．being caused

C．to be caused　　 D．to have caused

高三英语单项填空中等难度题查看答案及解析

The spread of the Ebola virus in Nigeria is believed _______ by August, 2014.

A．to be controlled

B．to have been controlled

C．to control

D．to have controlled

高三英语单项填空中等难度题查看答案及解析

The spread of the Ebola virus in Nigeria is believed ______ by August, 2014．（　　 ）

A．to be controlled    B．to have been controlled

C．to control    D．to have controlled

考点：不定式

高三英语单项填空中等难度题查看答案及解析

It’s reported that one thousand people are affected by the H1N1 flu virus in that area , two hundred and fifty-five children ____.

A．were included     B．including

C．include            D．included

高三英语单项填空中等难度题查看答案及解析

Influenza is an infection caused by flu viruses travelling through the air and entering the body through the nose or mouth. From October 2018 to early May 2019, up to 61,200 people died due to flu complications, while up to 647,000 people were hospitalized, according to the Centers for Disease Control and Prevention. Despite similar symptoms, a cold is milder than the flu while flu symptoms develop more suddenly and severely and can impact your body above and below the neck. 1.

Several factors can lead to Influenza. 2. You can catch the flu, breathing in these droplets, or touching objects such as doorknobs or keyboards that are contaminated with the virus and then touching your nose, or mouth. People under 4, or above 65 or with a weakened immune system are at greater risk of catching the flu.

Treatment without delay plays a dominant role. If you promptly see your doctor upon noticing symptoms, he or she may give you an antiviral drug, oseltamivir. 3.“The best way to treat the flu is to rest, drink fluids and use any other remedies that best relieve your symptoms such as pain reliever for headaches and achy muscles.” says a professor of infectious diseases at Northwestern Memorial Hospital.

Prevention is better than defense.4. Experts widely agree that the single best way is to get the vaccine (疫苗) each year, which is appropriate for anyone 6 months and older. 5. Moreover, practicing good hygiene can prevent flu germs from spreading. Highly recommended are washing your hands, coughing or sneezing into a tissue, avoiding touching your nose and mouth, cleaning surfaces and objects like keyboards and telephones and avoiding crowded areas.

A.Approaches to flu vary from expert to expert.

B.You can escape catching influenza with some common-sense health practices.

C.When someone with the flu coughs or sneezes, droplets carrying the virus enter the air.

D.These can include fever, achy muscles, sore throat, cough, headache, chills, fatigue or vomiting.

E.The flu shot protects against the most common three or four flu viruses research indicates that year.

F.If taken within two days, the medicine can lessen symptoms and shorten the length of time you are sick by about a day.

G.To determine if you have the flu or a cold, your doctor will do a physical exam, ask about your symptoms, and possibly do a lab test.

高三英语七选五中等难度题查看答案及解析

One way for students to prevent H7N9 flu virus is to open the windows of the classroom to allow the air to ________.

A. accumulate            B. circulate          C. illustrate          D. accelerate

高三英语单项填空中等难度题查看答案及解析

The 2009 outbreak of HINI is a new kind of influenza virus, commonly referred to as “swine flu”. It is thought to be a break of four known kinds of influenza. A virus subtype H1N1: one endedmic(流行病) in humans, one endemic in birds, and two endemic in pigs (swine). The source of the outbreak in humans is still unknown, but cases were first discovered in the U.S. and soon after in Mexico.

According to the U.S. Centers for Disease Control and Prevention(CDC)，it is not yet clear how serious this new virus actually is compared with other influenza viruses, although on May 26 they stated that new cases in the U.S. have probably reached the hightest point, and most cases have so far been mild relative to “seasonal flus”. But because this is a new virus, most people will not have immunity(免疫性) to it, and illness may eventually become more severe and widspread. The H1N1 flu mainly spreads in the same way that regular “seasonal influenza” spreads through the air from coughs and sneezes or touching those infected. It cannot be transmitted from eating cooked pork or by being in close contact with pigs.

As yet there is no vaccine(疫苗) available to prevent infection although companies are in the planning stages for having one available later this year. But there is concern that the virus could vary again over the coming months, leading to a new and potentially more dangerous flu outbreak later in the year, and a vaccine that will be less effective in preventing its spread.

As of May 27, the virus had spread to more than 50 countries; however, over 80% of reported deaths have taken place in Mexico. According to the CDC, the fact that the flu’s infection activity is now monitored more closely may help explain why more flu cases than normal are being recorded in Mexico, the United States and other countries.

1.The 2009 outbreak of H1N1 is thought to ________.

A.be concerned with four endmics

B.have come from the virus from pigs

C.occur because of unknown virus in Mexico

D.be caused because of people without immunity

2.According to the U.S. Centers for Disease Control and Prevention, ______.

3.To make people worried more is that ________.

4.From the passage we can learn that ________.

A.every country is watching closely the spreading of the H1N1

B.more than one-fourth of the deaths from the H1N1 are in Mexico

C.only the United States and Mexico recorded the cased of influenza

D.effective medicine has been produced to cure the H1N1

高三英语阅读理解中等难度题查看答案及解析

Is it okay to keep exercising when you have a cold? What about the flu? With winter viruses going around, it’s important to know how to alter your training if you do catch a germ or two.

“The guidelines are pretty easy,” says Dr Lorenzo Masci from the Alphington Sports Medicine Clinic. “Anything above the neck --- so if you’ve got a cold for example, a runny nose or a sore throat --- then you should probably cut down your exercise by half and do 50 percent of what you normally do.”

“If you’ve got anything below the neck, like muscle pain, joint pain or fever, you shouldn’t really exercise at all until those general symptoms settle down,” Lorenzo says. He points out that a cough would also fall into this more serious category. “For example, if anyone comes in with a fever and a runny nose, I’d tell them to stop exercising until the fever and the muscle ache settles. Then they can start their training again at 50 percent once all those symptoms settle, even if they’ve got a bit of a runny nose or a sore throat.”

“The reason we tell people to stop exercising is because if you exercise when you’re unwell it can make the illness worse and prolong it.” There is a second reason Lorenzo advises his patients to stop exercising when they have “below the neck” symptoms. In the event you have an illness which affects your heart, exercise can sometimes actually lead to death.

Lorenzo advises to take zinc (锌) and vitamin C as a way of preventing colds. But he admits that this is controversial --- some studies have shown that these supplements can improve immune function while other studies have cast doubt on the issue. The good news is that if you exercise regularly, you’re likely to improve your immune function. “If you exercise too much, it can predispose (使倾向于) you to coughs and sniffles,” he points out. This is often the case for excellent athletes who train every day, such as triathletes (铁人三项运动员). “But what we do know is that if you exercise at a moderate level, your immune system improves such that you’re probably at a lower risk of developing coughs and colds.”

1.How many guidelines does Dr Lorenzo mainly suggest on doing exercises when people catch a cold?

A．One.　　 B．Two.　　 C．Three.　　 D．Four.

2.How should people do exercises with a fever or a cough?

A．They should probably reduce their training time by 50%.

B．They should stop exercising until they recover.

C．They should start exercising at 50% after their runny nose settles.

D．They should do half of what they normally do.

3.What is the worst result if people don’t stop exercising when they are unwell?

A．Worsening the illness.

B．Prolonging the illness.

C．Affecting the heart.

D．Bringing about threat to life.

4.What can be proved from the last paragraph?

A．Zinc and Vitamin C can help to prevent colds.

B．The more exercises we do, the stronger our immune function will be.

C．Doing exercises regularly can help us prevent colds.

D．Excellent athletes seldom get coughs or sniffles.

5.What is this passage mainly about?

A．Relationship between exercises and flu.

B．How to do exercises.

C．How to cope with flu.

D．When to do exercises.

高三英语阅读理解中等难度题查看答案及解析

Global Health officials have been closely monitoring a new virus related to SARS that is believed ______ at least one person in Saudi Arabia．

A．to kill                                B．to be killing

C．to have killed                          D．kill

高三英语单项填空中等难度题查看答案及解析