B细胞活化的主要表现是（）
A.分泌抗体
B.表达抗原肽：MHC-Ⅰ类分子
C.表达Iga和Igβ
D.表达多种细胞因子受体
E.表达CD40
参考答案：D
用所给单词的适当形式完成句子。
1. Our family had a _____ (please) weekend together with Mr Black.
2. The soup is so_____ (salt) that I can't stand it.
3. The _____ (mix) tastes delicious. Would you like some?
4. He is one of the top _____ (chef) in Sichuan Province.
5. The _____ (fly) disk was invented by college students.
20世纪以来，（）逐渐取代了财产权的绝对概念，成为产业民主的一个重要理论基础。
A、劳权
B、平等
C、利益相关学说
D、 * *
