苔黄而干涩，中有裂纹如花瓣形，称为（）
A．霉腐苔
B．黏腻苔
C．黄瓣苔
D．脓腐苔
参考答案：C
She reached the top of the hill and stopped ______ on a rock by the side of the path.
A．to have rested
B．resting
C．to rest
D．rest
动物细胞培养有什么特点？
