在C++程序中，使用基本输入输出流需要包含的头文件是( )。

当需要使用ifstream流类定义一个流对象并联系一个磁盘文件时，应在文件开始使用#include命令，使之包含（）头文件。

用高级语言编写的程序叫源程序文件，再通过（）程序生成目标程序文件。

在一个C语言程序文件中，若要包含另外一个头文件或程序文件，则应使用的预处理命令为（）。

在使用scanf函数之前应包含头文件"math.h"。 ( )

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.

The （） is used for hauling in or letting out the wires or ropes.

Vessels must be（）valid certificate of nationality or certificated of registry or license.

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。