在X.509标准中,不包含在数字证书中的数据域是()。
A.序列号
B.签名算法
C.认证机构的签名
D.私钥
参考答案:D
解析:
哪项是风湿热的主要表现()
A.不规则发热
B.关节疼痛
C.心电图上P-R间期延长
D.环形红斑
E.血沉增快
D()is one of the design features of human language which refers to the phenomenon that language consists of two levels: a lower level of meaningless individual sounds and a higher level of meaningful units.