若每一条指令都可以分解为取指、分析和执行三步。已知取指时间t取指=5△t,分析时间t分析=2△t,执行时间t执行=5△t。如果按顺序方式从头到尾执行500条指令需()△t。如果按照[执行]k、[分析]k+1、[取指]k+2重叠的流水线方式执行指令,从头到尾执行500条指令需()△t。 如果按顺序方式从头到尾执行500条指令需()△t。
A. 5590
B. 5595
C. 6000
D. 6007
Certificates are () documents attesting to the () of a public key to an individual or other entity. They allow verification of the claim that a given public key does in fact belong to a given individual. Certificates help prevent someone from using a phony key to () someone else. In their simplest form, Certificates contain a public key and a name. As commonly used, a Certificate also contains an () date, the name of the CA that issued the Certificate, a serial number, and perhaps other information. Most importantly, it contains the digital () of the certificate issuer. The most widely accepted format for certificates is X.509, thus, Certificates can be read or written by any application complying with X.509. to the () of a public key to an individual or other entity.
A. connecting
B. binding
C. composing
D. conducting
下面的程序段中,() 是语句覆盖测试用例,() 是判定覆盖测试用例。 if (a<80) b=0; else if (a<=150) b=5; else if (a<200) b=8; else b=1; 下面的程序段中,()是语句覆盖测试用例。
A. a=(80,150,200,201)
B. a=(80,81,199,200)
C. a=(79,149,200,201)
D. a=(79,150,199,200)
案例分析题建设单位拟兴建一栋20层办公楼,投资总额为5600万元,由建设单位自行组织公开招标。建设单位对甲、乙、丙、丁、戊五家施工企业进行了资格预审,其中丁未达到资格预审最低条件。建设单位于投标截止日后的第二天公开开标。评标阶段丙向建设单位行贿谋取中标,评标委员会向建设单位推荐了甲、乙施工企业为中标候选人,建设单位均未采纳,选中丙为中标人。建设单位向丙发出中标通知书,并要求降低报价才与其签订合同。 根据《招标投标法》的规定,下列关于建设单位的说法中正确的是()。
A. 建设单位有权要求丙降低报价
B. 建设单位应在招标文件确定的提交投标文件截止时间的同一时间开标
C. 建设单位可以在招标人中选择任何一个投标人中标
D. 评标委员会成员中的2/3可以由建设单位代表担任