Question

This year’s flu season is pretty scary. To try to minimize the effects, public officials are still urging anyone who hasn’t yet gotten their flu shot to get one as soon as possible. However, even if every single person got a shot in the arm, the vaccine(疫 苗)—with its excellent 36 percent effectiveness—would not prevent everyone from getting infected with the annoying virus. Knowledge is power, so here's what goes on in your body when you come down with the flu.

The influenza virus primarily attacks your nose, throat, and the tubes that lead to your lungs. But the flu is so much more than that. Your muscles ache, your head hurts, and your appetite goes down, among other things. To our surprise, almost all of these symptoms  have  less  to  do  with  the  virus  itself  than  with  your  immune( 免 疫 的)response to them. Unfortunately, the very defense you have in place to get rid of the flu is the reason you feel so painful when you recover.

The virus usually enters through your mouth, typically by way of your hands . But it takes a few days for symptoms to set in. While this process might cause some harm to your nose and throat, it's nothing major, and nothing like the symptoms that typically accompany a bad or even mild case of the flu.

The real fun starts when your immune system begins to fight. Your immune system comes in two parts: the innate system and the adaptive. The innate immune system is essentially an all-purpose tool. As soon as your body senses the presence of any injury or invader , the innate immune system launches into action by producing tiny proteins called cytokines and chemokines. The cytokines reproduce almost immediately and start to attack the virus. This increase in immune cells creates a serious inflammation( 炎 症 ) throughout the body. But the worst is still to come.

Meanwhile, the chemokines work with the adaptive immune system to help create T cells. These cells are a special type of white blood cell that works in a much more specific way: They find the influenza virus, identify what's special about it, and create something unique on their surface that finds and destroys similar invaders.

1.What can we infer from Paragraph 1?

A. All the vaccine is not effective.

B. No one can avoid catching this year's flu.

C. This year's flu is the most serious one in recent years.

D. Public health officials have to use a gun when necessary.

2.Why many parts of your body suffer while you're recovering from a flu?

A. Because recovery from illness is painful.

B. Because your immune system is working against your defense system.

C. Because your body is fighting hard against the flu.

D. Because the influenza virus attacks your nose, throat and other parts.

3.The underlined word “fun” in Paragraph 4 can be replaced by      .

A. joy    B. battle

C. action    D. program

4.What's the main idea of Paragraph 4?

A. The fight between innate immune system and the adaptive.

B. The categories of immune system.

C. The way immune system works.

D. The process of the development of immune system.

Answer

1. A

2. C

3. B

4. C

【解析】

本文主要讲了流感病毒是如何侵袭人体，让人类生病，以及人类的免疫系统是如何和流感病毒做斗争，让人们恢复健康的。

1.推理判断题。由However, even if every single person got a shot in the arm, the vaccine(疫苗)--- with its excellent 36 percent effectiveness---would not prevent everyone from getting infected with the annoying virus.可推知并不是所有的疫苗都有效，选A。

2.细节理解题。由Unfortunately, the very defense you have in place to get rid of the flu is the reason you feel so painful when you recover.可知当你从流感中恢复的时候，你身体的许多部分都感觉很难受，是因为你的身体正在和流感作斗争，选C。

3.词义猜测题。The real fun starts when your immune system begins to fight.这句话的意思是当你的免疫系统开始作战的时候，真正的战役开始了。fun的意思是战役，选B。

4.段落大意题。第四自然段主要讲了免疫系统是如何和流感病毒做斗争的，选C。