长沙市妇幼保健院始建于
参考答案:
1962年,1987年由所改院。
若n(n≠0)是关于x的方程x2-mx-4n=0的根,则m-n的值为______.
The Customs shall reply in writing within ______ from the date of receipt of the application for the refund of the duty paid and notify the applicant of its decision.
A.one month B.two monthsC.three monthsD.six months