【单选题】假设一贴现债券的面额是100元,期限2年,售价为96元,则计算贴现债券的到期收益率为
【单选题】T cells and B cells share the same characteristics
A.
Antigen can be presented
B.
exist in thoracic duct
C.
Has CD19-CD21-CD81 coreceptor
D.
mIg is expressed on the membrane surface
E.
Redivision can be induced by antigen
【判断题】All cells share similar structure, composition and metabolic features: Plasma membrane, DNA/RNA, and Ribosome.
【单选题】250 当企业的产品处于生命周期的成熟期,可借助中间商即采用
【简答题】一个数据结构在计算机中的【 】称为存储结构