精密称取盐酸普鲁卡因0.5988g,照永停滴定法,在15-25 °C ,用亚硝酸钠滴定液(0.1002mol/L)滴定,消耗滴定液21.87ml。每1ml亚硝酸钠滴定液(0.1mol/L)相当于27.28mg的C 13 H 29 N 2 O 2 · HCl 。2015年版《中国药典》规定:本品按干燥品计算,含C 13 H 29 N 2 O 2 · HCl 不得少于99.0%,请问本品含量测定结果是否符合规定?
【单选题】听力原文:M:Could you tell me what the qualifications are for applying for financial assistance? W:Yes.Anyone who has a B average can apply for a scholarship if he needs financial aid. Q:what does the woma...
A.
To apply for a scholarship, one needs a B average.
B.
Students with more than a B average can apply for scholarship.
C.
No one can make a B average to get the scholarship.
【单选题】听力原文:M: Do you think people today do a good job of planning for financial emergencies? W: Well,I think most people want to have a secure future. Um,however,the information they need to achieve financi...