问题
单项选择题 A1/A2型题
体液免疫初次应答时产生Ig的特征是()
A.产生的抗体以IgG为主
B.IgM出现较晚
C.抗体为高亲和力抗体
D.抗体含量比再次应答高
E.抗体的产生持续时间较长
答案
参考答案:B
体液免疫初次应答时产生Ig的特征是()
A.产生的抗体以IgG为主
B.IgM出现较晚
C.抗体为高亲和力抗体
D.抗体含量比再次应答高
E.抗体的产生持续时间较长
参考答案:B
读一读,写一写。 | |
Peter goes to the library at ten in the morning. Then he has lunch with his friends at one fifteen in the canteen. He goes home at six and has dinner at seven ten. On Sunday, Peter goes to a music class at two in the afternoon. Then he plays computer games, at eight.
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