公钥基础设施（PKI）的有效应用是加密（）。 ["全部信息","私钥","公钥","对称会话密钥"]
假设A、B两个相邻基站的PN也相邻，分别为4和2，当前服务基站A到达移动台的相位时延为20个chip，其SRCH_WIN_A为80个chip，则基站B到达移动台的时延大于（）个chip时，会出现邻PN干扰。 ["88","108","128","148"]
私募股权投资基金发展中存在的问题有（） ["资金来源短缺，本土机构实力薄弱","缺乏优质项目资源","专业水平有待提高","制度供给不足、法规体系有待健全"]
交通银行掉期结售汇交易中，保证金的释放将在（）。 ["A.真实性审核完成后","B.履约合同期签订后","C.近端交割完成后","D.远端交割完成后"]
The hand steering is a method by which the motion of the rudder is controlled with （）. ["a motor-driven steering wheel","a pneumatic steering wheel","a hand-driven steering wheel","an electric steering wheel"]
厄尔尼诺和拉尼娜
