申请数字证书，授权码的有效期为多久（）。

在上海市数字证书认证中心申请个人数字证书的第一步是（）。

翻译：With Average or With Particular Average（WA or WPA）（）

学生因个人原因不能参加考试的，必须事先向本学院（）申请，学院审核同意，经（）批准后可以缓考。

一个人可以申请多个电子邮箱。

1946年，世界上第一台电子数字积分式计算机－（）在美国宾夕法尼亚大学莫尔学院诞生。

Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo，without the authorization or privity of the Shipowner or his agent，is（）.

（）, or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.

A salvor may be（）the whole or part of the payment due under Salvage Convention to the extent that the salvage operations have become necessary or more difficult because of fault or neglect on his part or if the salvor has been guilty of fraud or other dishonest conduct.

单位一员工试用期遭遇事故，能否申请工伤认定？如何申请？

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。