问题
名词解释
五辐射对称
答案
参考答案:
五辐射对称是通过虫体的口面自反口面的中轴,可以把身体五次不同的切割,所切出的两部分基本上互相对称,或者说沿着身体的体轴,整个身体由五个相似的部分组成。
五辐射对称
参考答案:
五辐射对称是通过虫体的口面自反口面的中轴,可以把身体五次不同的切割,所切出的两部分基本上互相对称,或者说沿着身体的体轴,整个身体由五个相似的部分组成。
Observe that for the programmer,as for the 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 (71) choices. Now I do not think software (72) have less inherent courage and firmness than chefs,nor than other engineering managers.But false (73) to match the patron’s desired date is much more common in our discipline than elsewhere in engineering.It is very (74) 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 (75) 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
某项目计算期为10年,其各年的净现金流量如表1所列,该项目行业基准收益率为10%,则项目的财务净现值为( )万元。
表1 某项目各年净现金流量表
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A.47.6
B.39.4
C.48.5
D.43.3