CW-200K型车空气弹簧的横向变位可达（）以上。
A.100mm
B.110mm
C.120mm
D.140mm
参考答案：B
He has many friends at school, ________?[ ]
A. has he
B. does he
C. doesn't he
D. isn't he
不需要抗体参与的是（）
A.Ⅰ型超敏反应
B.Ⅱ型超敏反应
C.Ⅲ型超敏反应
D.Ⅳ型超敏反应
E.以上均不需要
