问题 选择题

脊髓灰质炎疫苗可以预防小儿麻痹症,这种免疫属于(  )

①非特异性免疫  ②特异性免疫  ③自然免疫  ④计划免疫.

A.①③

B.②③

C.①④

D.②④

答案

由分析可知给小儿服用的小儿麻痹疫苗糖丸是由病原体制成的,只不过经过处理之后,其毒性减少或失去了活性,但依然是病原体,进入人体后不会使人得病,但能刺激免疫细胞产生相应的抗体,则这种疫苗相当于抗原,其产生的抗体只对引起小儿麻痹症的病原体起作用,对其他病原体无效,可见其免疫作用是特定的,有针对性的,属于特异性免疫.而计划免疫是指根据某些传染病的发生规律,将各种安全有效的疫苗,按照科学免疫的程序,有计划地给儿童接种,以达到预防、控制和消灭相应传染病的目的,脊髓灰质炎疫苗可以预防小儿麻痹症,像这种有计划的进行预防接种,叫计划免疫.

故选:D

阅读理解

Mary Brown from East county in Scotland, she had the accident that had scarred(留下创伤) her for life when she was only one and a half years old. The curious child reached up to grab the wire of a hot kettle in the family kitchen and poured boiling water over her tiny infant frame.

Her mother Ruby turned round and, seeing Mary horribly burnt, called an ambulance which rushed her daughter to a nearby hospital. Twenty percent of Mary’s body had been burned and all of her burns were third-degree. There, using tissue taken from unburned areas of Mary’s body, doctors performed complex skin transplants to close her wounds and control her injuries, an operation that took about six hours. Over the next 16 years, Mary underwent 12 more operations to repair her body.

When she started school at Maxwelton Primary at age 4, other pupils made cruel comments or simply wouldn’t play with her. “I was the only burned child in the street, the class and the school,” she recalled, “some children refused to become friends because of that.”

Today, aged 17, Mary can only ever remember being a burned person with scars; pain is a permanent part of her body. She still has to have two further skin transplants. Yet she is a confident, outgoing teenager who offers inspiration and hope to other young burns victims.

She is a member of the Scottish Burned Children’s Club, a charity set up last year. This month, Mary will be joining the younger children at the Graffham Water Center in Cambridgeshire for the charity’s first summer camp. “I’ll show them how to get rid of unkind stares from others,” she says. Mary loves wearing fashionable sleeveless tops, and she plans to show the youngsters at the summer camp that they can too. “I do not go to great lengths to hide my burns scars,” she says, “I gave up wondering how other people would react years ago.”

小题1:What did other children do when Mary first went to school?

A.They were friendly to her.

B.They showed sympathy to her.

C.They looked down upon her.

D.They were afraid of her.小题2:Which of the following words can’t properly describe Mary?

A.Courageous

B.sensitive

C.Confident

D.Outgoing小题3:What can be the best title of the passage?

A.A seriously burned angel of Hope

B.Ways to Get Rid of Unkind Stares

C.Permanent Scars And Pain For a Girl

D.A Seriously Burned Girl Survives

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