问题
单项选择题
初次应答最主要的特点是
A.IgG大量产生
B.IgG产生的快
C.IgG和IgM同时产生
D.IgM产生的快
E.IgG的亲和力强
答案
参考答案:D
初次应答最主要的特点是
A.IgG大量产生
B.IgG产生的快
C.IgG和IgM同时产生
D.IgM产生的快
E.IgG的亲和力强
参考答案:D
用方框中所给单词的适当形式填空,使短文通顺、正确、连贯(每个单词限用一次)。
Tommy is a schoolboy. He’s thirteen 小题1: old. He’s in Class 3, Grade 1. He always小题2: up early and he often goes to school 小题3:bike. He likes English, Chinese and some 小题4:subjects. He enjoys singing and dancing. But now he is having 小题5:English class.小题6:! some of the students are reading books and some of the students are 小题7: the new words. They are 小题8: hard . But 小题9: is Saturday. They don’t have 小题10:classes. He and his friends will go to the movies. I think they’ll have fun. |