One solution to major security problem is（），which are frequently installed to fix known security holes.

（）is a clickable string or graphic that points to anoth...

单项选择题（）is a clickable string or graphic that points to another Web page or document.

In（）programming， the user determines the sequence of in...

单项选择题In（）programming， the user determines the sequence of instructions to be executed ，not the programmer.

The standard（）in C language contain many useful functio...

单项选择题The standard（）in C language contain many useful functions for input and output ， string handing，mathematical computations，and system programming tasks.