题目内容

现采用四级流水线结构分别完成一条指令的取指、指令译码和取数、运算以及送回运算结果四个基本操作，每步操作时间依次为60ns，100ns，50ns和70ns。该流水线的操作周期应为(4)ns。若有一小段程序需要用20条基本指令完成(这些指令完全适合于流水线上执行)，则得到第一条指令结果需(5)ns，完成该段程序需(6)ns。
(65)

A. 50
B. 70
C. 100
D. 280

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A．Because many of the boys in single parent families are raised by their mothers.B．Bec

A. Because many of the boys in single parent families are raised by their mothers.
Because many boys like the stories of women pioneers.
C. Because boys are more negative than girls.
D. Because many of the boys are from minority populations.

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A．variousB．variableC．variedD．variant

A. various
B. variable
C. varied
D. variant

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单位之间的往来超过结算起点(人民币1000元)以上的一律通过转账结算。()

A. 正确
B. 错误

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He looked so honest that we accepted his story ______ true.

A. for
B. near
C. as
D. like

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A. 50 B. 70 C. 100 D. 280

A．Because many of the boys in single parent families are raised by their mothers.B．Bec

A．variousB．variableC．variedD．variant

单位之间的往来超过结算起点(人民币1000元)以上的一律通过转账结算。()

He looked so honest that we accepted his story ______ true.

A. 50
B. 70
C. 100
D. 280