单项选择题
多项选择题 三级医院消毒供应中心,由省卫生厅组织考核合格后,颁发《医院消毒供应中心合格证》,题中错误的有效期是()年
单项选择题 听力原文:M: Excuse me, I'd like to see Mr. Clack's arrangement, please?W: He went to Europe for business two days ago. Yesterday he had a meeting in Sweden and now he's on a flight to Africa.Q: Where is Mr. Clack?(4)A.In Europe.B.In Africa.C.On the plane.D.In a car.
名词解释 心理的年龄特征