题目内容
In Unix operating systems, the EOF mark is generated whenever the ____ keys are pressed simultaneously.
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In IBM-compatible computers, the EOF mark is generated whenever the ____ keys are pressed simultaneously.
The ____ statement is similar to the break statement but applies only to loops created with while, do-while, and for statements.
The statement ____ is a null statement.
The need to initialize variables or make some other evaluations prior to entering a repetition loop is so common that the ____ statement allows all the initializing statements to be grouped together as the first set of items within the statement’s parentheses.
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