动物来源的破伤风抗毒素对人而言是（）
A.半抗原
B.抗体
C.抗原
D.既是抗原又是抗体
E.超抗原
参考答案：D
Mary ____ her mother; she has big eyes and red hair, too.
A．looks after
B．looks for
C．takes up
D．takes after
简述心脏扩大
