A:B细胞
B:T细胞
C:浆细胞
D:效应T细胞
There is a sofa (沙发)in this room. We chat (聊天)with each other and watch TV in this room. It's a____.
可遗传的变异是由什么引起的
结合全文《藤野先生》分析,作者开头写“清国留学生”的用意是什么?
用括号内所给词的适当形式填空(每空不限一词)。