艾滋病被称为“20世纪的癟疫”，艾滋病毒以人体内的（）作为攻击_爱下问搜题

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问题单项选择题

艾滋病被称为“20世纪的癟疫”，艾滋病毒以人体内的（）作为攻击目标。

A.红细胞

B.血红蛋白

C.淋巴细胞

D.神经系统

答案

参考答案：C

解析：艾滋病，即获得性免疫缺陷综合症（AIDS），是人类因为感染免疫缺陷病毒（HIV）后导致免疫缺陷，并发一系列机会性感染及肿瘤，严重者可导致死亡的综合征。艾滋病毒HIV需借助于易感细胞表面的受体进入细胞，在24—48小时内到达局部淋巴结，继而产生病毒血症，导致感染。故本题应选C。

选择题

Lian Zhan, the Chairman of the KMT,enjoyed the scenery of the Huangpu River ______ the night

of May 1st.[ ]

A. at

B. in

C. on

D. over

完形填空

Every morning my friend would stop on the way to work to have a quick breakfast with her 8-year-old son. Then she   1  him off at school. They ate the same thing every morning: an egg sandwich, juice, coffee for her, and milk for him.
One day she ordered a(n)   2  breakfast. Once they finished eating and were heading out of the door, she   3 , said good morning to a homeless man sitting outside of the   4 , and gave him the breakfast she had ordered for him. He   5  her, telling her it was his first meal during the last several   6 . She couldn’t help but feel   7  and was glad she finally took   8 .
She told her son that she had seen the man every day that week there and that   9 , herself included, had offered him   10 , support, food, or drink. She   11  explained that homelessness could happen to anyone and that it was important to   12  needy people.
So her “Tradition of Kindness”   13 . Each day she and her son went on to   14  the homeless man breakfast. The   15  was kept until they moved away several years later,   16  the experience was firmly put into her son’s mind.
My friend   17  every time she tells me that this “Tradition of Kindness” goes on with her son, who remembers this   18  tradition. Now working in a company, her son stops every morning at Starbucks for a coffee and offers a homeless person a breakfast before going to the   19 .
What a great tradition that he can   20  to his children as well!

B．information