问题 单项选择题 B1型题

具有刺激嗜酸性粒细胞增殖和分化作用的细胞因子是()

A.TNF-α

B.IL-5

C.IL-10

D.IFN-α

E.IL-18

答案

参考答案:B

解析:1.TNF-α又称恶病质素,是引起恶病质的主要细胞因子。2.IL-10为负性免疫调节因子,可抑制IL-2合成。3.IL-5不仅能刺激嗜酸性粒细胞增殖和分化,而且对嗜酸性粒细胞有趋化作用。4.IFN-α具有抗病毒作用,目前临床常用于HBV等病毒感染的治疗。

阅读理解

阅读理解。

                Yellow Dress

                              By Janet Lee

          Mary had a yellow dress 

       Bought from the department store.

        It looked as beautiful as the moon,

             And as bright as the sun.

              Mary wore all the time

                 The yellow dress

                  I felt so right.

            Every day from day to night

            I saw her in the dress so bright.

             "Buy me a yellow dress,"

              I cried to Mom and Dad,

               "As beautiful and bright

            As the dress the girl living near has!"

               I cried and cried and cried,

               Until they said with sad eyes, 

            "We need food for your baby sister,

           And clothes for your coming brother."

                  Since then I've learned 

          Mary's yellow dress Is better to dream of

                    Than to ask for.

1. Why does the writer say, "Every day from day to night / I saw her in the dress so bright"?

A. The writer lived with Mary.

B. The dress had sun shapes on it.

C. The writer liked the dress very much.

D. The dress was Mary's school uniform.

2. What did the writer's parents mean by their words?

A. They did not like the yellow dress.

B. They did not have money for a dress.

C. They already had a dress for her baby sister.

D. They would ask Mary where to buy the yellow dress.

单项选择题