设有两个事务T1、T2有如下调度,产生的不一致性是()
步骤 T1 T2
1 读A=100
2 读A=100
3. A=A+10写回
4. A=A-10
A:丢失修改 B:不可重复读 C:读脏数据 D:幻影读
Observe that for the programmer,as for chef, the urgency of the patron(顾客)may govern the scheduled completion of the task,but it cannot govern the actual completion.An omelette(煎鸡蛋),promised in two minutes,may appear to be progressing nicely.But when it has not set in two minutes,the customer has two choices-waits or eats it raw.Software customers have had () choices.
Now I do not think software () have less inherent courage and firmness than chefs,nor than other engineering managers.But false () to match the patron’s desired date is much more common in our discipline than elsewhere in engineering.It is very ()
to make a vigorous,plausible,and job risking defense of an estimate that is derived by no quantitative method,supported by little data,and certified chiefly by the hunches of the managers.
Clearly two solutions are needed.We need to develop and publicize productivity figures,bug-incidence figures,estimating rules,and so on.The whole profession can only profit from () such data.Until estimating is on a sounder basis,individual managers will need to stiffen their backbones and defend their estimates with the assurance that their poor hunches are better than wish derived estimates.
Observe that for the programmer,as for chef, the urgency of the patron(顾客)may govern the scheduled completion of the task,but it cannot govern the actual completion.An omelette(煎鸡蛋),promised in two minutes,may appear to be progressing nicely.But when it has not set in two minutes,the customer has two choices-waits or eats it raw.Software customers have had (?) choices.
Now I do not think software () have less inherent courage and firmness than chefs,nor than other engineering managers.But false () to match the patron’s desired date is much more common in our discipline than elsewhere in engineering.It is very ()
to make a vigorous,plausible,and job risking defense of an estimate that is derived by no quantitative method,supported by little data,and certified chiefly by the hunches of the managers.
Clearly two solutions are needed.We need to develop and publicize productivity figures,bug-incidence figures,estimating rules,and so on.The whole profession can only profit from () such data.Until estimating is on a sounder basis,individual managers will need to stiffen their backbones and defend their estimates with the assurance that their poor hunches are better than wish derived estimates.
A:no B:the same C:other D:lots of
Observe that for the programmer,as for chef, the urgency of the patron(顾客)may govern the scheduled completion of the task,but it cannot govern the actual completion.An omelette(煎鸡蛋),promised in two minutes,may appear to be progressing nicely.But when it has not set in two minutes,the customer has two choices-waits or eats it raw.Software customers have had () choices.
Now I do not think software () have less inherent courage and firmness than chefs,nor than other engineering managers.But false () to match the patron’s desired date is much more common in our discipline than elsewhere in engineering.It is very ()
to make a vigorous,plausible,and job risking defense of an estimate that is derived by no quantitative method,supported by little data,and certified chiefly by the hunches of the managers.
Clearly two solutions are needed.We need to develop and publicize productivity figures,bug-incidence figures,estimating rules,and so on.The whole profession can only profit from () such data.Until estimating is on a sounder basis,individual managers will need to stiffen their backbones and defend their estimates with the assurance that their poor hunches are better than wish derived estimates.
Observe that for the programmer,as for chef, the urgency of the patron(顾客)may govern the scheduled completion of the task,but it cannot govern the actual completion.An omelette(煎鸡蛋),promised in two minutes,may appear to be progressing nicely.But when it has not set in two minutes,the customer has two choices-waits or eats it raw.Software customers have had () choices.
Now I do not think software (?) have less inherent courage and firmness than chefs,nor than other engineering managers.But false () to match the patron’s desired date is much more common in our discipline than elsewhere in engineering.It is very ()
to make a vigorous,plausible,and job risking defense of an estimate that is derived by no quantitative method,supported by little data,and certified chiefly by the hunches of the managers.
Clearly two solutions are needed.We need to develop and publicize productivity figures,bug-incidence figures,estimating rules,and so on.The whole profession can only profit from () such data.Until estimating is on a sounder basis,individual managers will need to stiffen their backbones and defend their estimates with the assurance that their poor hunches are better than wish derived estimates.
A:testers B:constructors C:managers D:architects
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定规律性:
A B C D
A:A B:B C:C D:D
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定规律性: A B C D
A:A B:B C:C D:D
以下四个图形与其它图有区别的是? A B C D
A:如上图所示 B:如上图所示 C:如上图所示 D:如上图所示
把下面的六个图形分为两类,使每一类图形都有各自的共同特征或规律,分类正确的一项是 ① ② ③ ④ ⑤ ⑥
A:①②⑤,③④⑥ B:①③④,②⑤⑥ C:①③⑤,②④⑥ D:①④⑥,②③⑤
把下面的6个图形分为两类,使每一类图形都有各自的共同特征或规律,分类正确的一项是 ① ② ③ ④ ⑤ ⑥
A:①③⑥,②④⑤ B:①③④,②⑤⑥ C:①③⑤,②④⑥ D:①④⑥,②③⑤
2013年11月6日《中国信息报》刊发《改革开放铸辉煌经济发展谱新高》,用数字和图形展示了自1978年改革开放35以来中国经济社会发展的巨大变化,文章数据显示,1978—2012年,我国国内生产总值平均增长9.8%,国内生产总值由1978年的3645亿元迅速跃升至2012年的518942亿元,1978年人均国内生产总值仅有381元,2012年人均国内生产总值达到38420元,扣除价格因素,比1978年增长16.2倍,平均增长8.7%。
下列表述正确的是
A:2012年,我国人均国内生产总值是1978年的16.2倍 B:1978—2012年,我国国内生产总值年均增长8.7% C:1978—2012年,我国人均国内生产总值年均增长9.8% D:表中数据显示,2005年我国国内生产总值超过十万亿元
根据下面提供的信息完成91—95题。
2013 年,我国国内生产总值568845亿元,比去年实际增长7.7%,其中,第一产业增长值56957亿元,第二产业增加值249684亿元,第三产业增加值 262204亿元,第一产业增加量占国内生产总值的比重为10.0%,第二产业增加值比重为43.9%,第三产业增加值比重为46.1%,第三产业增加值占比首次超过第二产业。
2009—2013年我国国内生产总值情况
关于我国GDP情况,以下说法正确的是:
A:2012年,第一产业增加值占国内生产总值的比重约为10% B:从2011年起,国内生产总值实际增长速度已经连续三年地狱8% C:2010年,第二产业增加值占国内生产总值的比重高于第三产业 D:2013年,第二产业增加值占国内生产总值的比重最大
您可能感兴趣的题目