使人体获得免疫力的常用方法有两种，一种是给易感人群接种抗原，_爱下问搜题

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问题填空题案例分析题

使人体获得免疫力的常用方法有两种，一种是给易感人群接种抗原，另一种是注射抗体。下图显示了在第0天分别使用上述方法处理后的结果。请据图回答：

两种免疫方法，免疫力保持更长久的是（），这种差异主要与体内的（）细胞有关。

答案

参考答案：方法②；记忆

解析：当被狗咬伤后，使用抗狂犬病血清，由于血清里面含有抗狂犬病的抗体，所以会使体内抗体含量显著增加，对应方法①，注射疫苗产生抗体比较慢，对应方法②。抗体的本质是蛋白质，被称为免疫球蛋白。注射疫苗产生抗体的速度较慢，直接注射抗狂犬病血清，在较短的的时间内使体内迅速获得大量抗体，有效预防狂犬病。疫苗的作用是刺激机体产生相应的抗体，产生自体免疫反应。每隔几天注射疫苗可以刺激机体产生二次免疫反应，加强免疫力。这样做的原理是记忆B细胞迅速增殖分化，产生较多的浆细胞和新的记忆B细胞，浆细胞迅速产生大量抗体。这两种方法中，注射疫苗的免疫力保持更长久一点，主要是由于体内的记忆细胞的作用。考点：考查人体免疫。

单项选择题 A1/A2型题

CH50法是用于测定（）

A.C₃活性

B.C₄活性

C.C₃含量

D.总补体含量

E.总补体活性

完形填空

Pass Your Love On
Waiting for the airplane to take off, I was happy to get a seat by myself. Just then, an air hostess approached me and asked, “Would you mind   36  your seat? A couple would like to sit together.” The only   37 seat was next to a girl with her arms in casts (石膏绷带)，a black-and-blue face, and a sad expression. “   38  am I going to sit there,” I thought immediately. But a soft voice spoke, “She needs help.” Finally, I     39 _ to move to that seat.
The girl was named Kathy. She   40  in a car accident and now was on her way for_ 41  .
When the snack and juice arrived, it did not take me long to   42  that Kathy would not be able to  43  herself. I considered  44   to feed her but hesitated, as it seemed too   45  to offer a service to a  46___. But then I realized that Kathy’s need was more   47  than my discomfort. I offered to help her eat, and   48  she was uncomfortable to accept, she   49  as I expected. We became closer and closer in a short period of time. By the end of the five-hour trip, my heart   50  , and the   51  was really better spent than if I had just sat by myself.
I was very glad I had reached   52  my comfort zone(地带) to sit next to Kathy and feed her. Love   53 flows beyond human borders（边界） and removes the fears that keep us   54 . When we   55  to serve another, we grow to live in a larger and more rewarding world.

A．comfortable

A．interpreter

B．independent