报文摘要用于______。A.报文鉴别 B.报文加密 C.报文解密 D.邮件传送 发布时间:2017-05-28 21:41 │ 来源:www.tikuol.com 题型:单项选择题 问题: 报文摘要用于______。A.报文鉴别B.报文加密C.报文解密D.邮件传送
题型:单项选择题 对于铸造核桩蜡型制作完成后的要求,下列哪一项不正确 ()A.根管外核的蜡型与烤瓷全冠牙体制备后的形态一致B.根管蜡型可以粗糙些以增加固位C.两邻面稍向切端聚合2°~4°D.轴壁光滑无倒凹E.核的周围留出烤瓷全冠厚度 查看答案
题型:单项选择题 The engine of the ship was out of order and the bad weather __the helplessness of the crew at sea.[ ]A. added to B. added up C. added D. added up to 查看答案