There will be an exciting film ____ at the cinema next week.
A. on
B. in
C. up
D. over
查看答案
The villagers all agreed to ____ the railway into the mountains.
A. spread
B. enlarge
C. extend
D. increase
B细胞表面，BCR信号转导的分子是
A. CD79a/CD79b
B. CD40
CD32
D. CD19
不属于B细胞表面抗原的
A. CD80
B. CD21
CD28
D. CD19
在B细胞发育过程中，BCR基因最先发生重排的是
A. H链V区基因
B. H链C区基因
C. L链V区基因
D. L链C区基因
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