（）是使橡胶分子产生交联，形成三维网状结构，使具有可塑性的生胶变为具有弹性的硫化胶。
A．增塑剂
B．硫化剂
C．软化剂
D．硫化催进剂
参考答案：B
He bought his girlfriend diamond ring, but he was told that diamond in that ring was an imitation glass.
A．a; the
B．a; /
C．the; a
D．/; the
催乳素细胞属于（）
A.嗜酸性细胞
B.嗜碱性细胞
C.嫌色细胞
D.垂体细胞
E.性腺细胞
