关于微循环的描述,不正确的是
A:微循环指由微动脉到微静脉之间微血管的循环系统 B:微循环是血液循环的基本功能单位 C:微循环是调节局部血流、影响局部代谢和功能的结构 D:微循环血管包括微动脉、中间微动脉、真毛细血管、直捷通路、动静脉吻合和微静脉 E:微循环的血流只有从微动脉至动静脉吻合再到微静脉一条途径
关于微循环的描述,下列哪项是错误的
A:微循环指由微动脉到微静脉之间微血管的循环系统 B:微循环是血液循环的基本功能单位 C:微循环是调节局部血流、影响局部代谢和功能的结构 D:微循环血管包括微动脉、中间微动脉、真毛细血管、直捷通路、动静脉吻合和微静脉 E:微循环的血流只有从微动脉至动静脉吻合再到微静脉一条途径
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
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