问题
单项选择题 A3/A4型题
细胞表面分子于其功能密切相关，其表面分子包括CD2、CD3、CD4、CD5、CD7、CD8、TCR以及一些协同信号分子等。
T淋巴细胞识别抗原后的信号传递是通过（）
A.CD3
B.CD4
C.CD5
D.CD7
E.CD8
答案
参考答案：A
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细胞表面分子于其功能密切相关，其表面分子包括CD2、CD3、CD4、CD5、CD7、CD8、TCR以及一些协同信号分子等。
T淋巴细胞识别抗原后的信号传递是通过（）
A.CD3
B.CD4
C.CD5
D.CD7
E.CD8
参考答案：A
| 根据短文内容填写表格。 Mike is a middle school student. He goes to school from Monday to Friday. His home is about 5 miles from school. He usually walks to school. It takes him 30 minutes to walk there. Nancy's home is a little farther. It's 20 miles from school. So she often takes the school bus. It takes her 15 minutes to get to school. Bob lives outside the city. It's a town 30 miles away from his school. He takes the subway. It takes him 8 minutes to get to school by subway. He can have breakfast at home and then leave for the subway station. He studies very hard. | ||||||||||||||||
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