搜题请搜索小程序“爱下问搜题”
问题 单项选择题

某工程双代号时标网络计划如下图所示，其中工作B的总时差和自由时差（）。

 

A．均为1周

B．分别为3周和1周

C．均为3周

D．分别为4周和3周

答案

参考答案：B

解析：

工作B的总时差=1+2=3周；工作B的自由时差为1周。

单项选择题

治疗咽喉红肿疼痛，兼有肺热咳嗽痰多者，应首选（）

A.射干

B.鱼腥草

C.马勃

D.板蓝根

E.山豆根
查看答案
单项选择题

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 __(1)__ choices. Now I do not think software __(2)__ have less inherent courage and firmness than chefs,nor than other engineering managers. But false __(3)__to match the patron's desired date is much more common in our discipline than elsewhere in engineering. It is very __(4)__ 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__(5)__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.

空白（2）处应选择（）

A.testers 

B.constructors 

C.managers 

D.architects
查看答案