单项选择题

Local bus can reduce the occupation time of CPU. For the EISA local bus, commonly the time can be reduced to( ).

A．42%
B．22%
C．12%
D．2%
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单项选择题
Which of the following statements about testing software with data is (are) true ( ) Ⅰ．The primary purpose of such testing is to find errors Ⅱ．Such testing can demonstrate the existence of errors but cannot demonstrate the absence of errors
A．Neither
B．Ⅰ only
C．Ⅱ only
D．Ⅰ and Ⅱ
单项选择题
若一个子程序起始地址为3K，调用指令CALL的内存地址为K+1，则执行CALL指令所要执行指令的地址为( )。
A．3K
B．3K+1
C．3K-1
D．K+2
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