问题
单项选择题 A1型题
人类白细胞膜上的抗原有
A．1类
B．2类
C．3类
D．4类
E．5类
答案
参考答案：C
解析：人类白细胞膜上有3类抗原：红细胞血型抗原，白细胞特有抗原，与其他组织共有，但也是最强的人类白细胞抗原。
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人类白细胞膜上的抗原有
A．1类
B．2类
C．3类
D．4类
E．5类
参考答案：C
解析：人类白细胞膜上有3类抗原：红细胞血型抗原，白细胞特有抗原，与其他组织共有，但也是最强的人类白细胞抗原。
Miracles（奇迹）will happen if you don’t give up trying. Even if you have 1 for one hundred times, you may succeed when you try for the 10lst time. When I was born, my doctor told my mother that there was something wrong with my 2 . They were too soft to be able to walk. Although the news was bad, my mother didn’t become 3 . She didn’t believe what the doctor said 4 started to look for other ways. My mother kept looking for other doctors for me, and finally she 5 . The doctor and his team in the hospital did 6 they could to help me. They also asked my parents to teach me to do some 7 to help me walk. One day when my mother came to pick me 8 . I crawled(爬) towards her. She was so surprised and happy that she couldn’t believe 9 eyes. Crawling was not walking, but it was a good 10 . Day by day, I could walk by myself. When I grew up, my mother 11 told me these stories. She said that if I thought of what she said whenever I met 12 , I could do anything successfully. I have been working hard and I have turned out to be a very 13 person.. I get best grades in school and I am a good dancer and swimmer. 14 my mother’s strong resolution, I live a happy life now. What the story tells us, as my mother always says, 15_: Never give up.
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