问题
单项选择题
肿瘤逃逸免疫排斥的机制不包括（）
A.肿瘤抗原性较弱
B.宿主产生对肿瘤抗原的耐受
C.肿瘤细胞表达的.MHC分子增多
D.抗体可封闭肿瘤抗原
E.黏附分子降低
答案
参考答案：C
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肿瘤逃逸免疫排斥的机制不包括（）
A.肿瘤抗原性较弱
B.宿主产生对肿瘤抗原的耐受
C.肿瘤细胞表达的.MHC分子增多
D.抗体可封闭肿瘤抗原
E.黏附分子降低
参考答案：C
Boys and girls, Attention, please! Do you know to keep safe in our daily（日常的）life? Today I’d like you some ways to keep safe. 1. Always play in a place. A park is a safe place there are no cars or buses in it. 2. the traffic rules, please! Before crossing a road, and look both ways ——look left, look right and look left . 3. Never put your head or hands a car, a bus or a train. Many people get or lose their lives by doing so. 4. Don’t a stranger（陌生人）or go with him/her. That’s all. All the students should obey the rules anytime(任何时候).
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