发生于唾液腺的圆柱瘤又称
A．嗜酸性腺瘤B．基底细胞腺瘤C．腺样囊腺癌D．肌上皮瘤E．多形性腺瘤
参考答案：C
—She should have been informed of the meeting.
—______，but she wouldn’t like to attend this meeting.
A．Yes，she should
B．So she was
C．So was she
D．So it was with her
Oracle表的唯一键约束与主键约束的一个区别是唯一键标识的表列可以为空。
