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Using the problem stated in the Special window, Calculate the expected value of duration (in days) using the PERT concept of the expected duration of a task
A . 8
B . 8.8
C . 9.1
D . 9.7
E . 10.5
答案
更多“Using the problem stated in the Special window, Calculate the expected value of duration （”相关的问题
第1题
5 Using the problem stated in the Special window, Calculate the deviation of duration for the task, using the PERT concept of standard deviation of task duration.
A. 0.5
B. 1.0
C. 1.8
D. 2.2
E. 2.8
第2题
123 Using the problem stated in the Special window, Calculate the deviation of duration for the task, using the PERT concept of standard deviation of task duration.
A. 0.5
B. 1.0
C. 1.8
D. 2.2
E. 2.8
第3题
122 Using the problem stated in the Special window, Calculate the expected value of duration (in days) using the PERT concept of the expected duration of a task
A. 8.0
B. 8.8
C. 9.1
D. 9.7
E. 10.5
第4题
A . 0.5
B . 1
C . 1.8
D . 2.2
E . 2.8
第5题
According to a report from the technology website Venture Beat, PayPal CEO David Marcus wrote a critical letter to his employees blaming them for not using PayPal products and encouraging them to leave if they didn't have the passion to use the products they work for.
According to the website, part of the leaked letter reads:
“It's been brought to my attention that when testing paying with mobile at Cafe 17 last week, some of you refused to install the PayPal app, and others didn't even remember their PayPal passwords. That's unacceptable to me, and the rest of my team, everyone at PayPal should use our products where available. That's the only way we can make them better, and better.”
“In closing, if you are one of the folks who refused to install the PayPal app or if you can't remember your PayPal password, do yourself a favor, go and find something that will connect with your heart and mind elsewhere.”
While not obvious at first, the letter reveals a problem of morale and culture at PayPal. As an executive, you certainly want your employees to use and promote your products. However, when faced with a situation where staff isn't embracing what they make, you need to investigate the root of the problem -- not threaten.
When faced with internal problems, good executives start by asking “why”. They reach out to their executive team first and then to the entire staff to find the root of a problem and how to fix it. Sending out a one-sided note about the problem is not leading, it's retreating.
Leadership starts by listening. Good executives need to get out among the staff and ask questions and listen without judgment or reaction. The fact that company employees are not embracing and using its products is a failure of leadership that Marcus needs to address by self-reflection. At the end of the day, if his employees have to be forced to use the app, how can he expect consumers to want
1. A CEO only needs to be passionate and enthusiastic.
2. It is not professional that PayPal CEO blames his employees for not using PayPal or forgetting PayPal passwords.
3. “A one-sided note” refers to the root of PayPal's problem.
4. When faced with internal problems, good executives find the root of a problem in their executive team first.
5. Good executives need to give feedback immediately when they are listening to the staff.
第6题
The Right Way to Motivate Employees
It’s important for a CEO to be passionate and enthusiastic, but there’s a line of professionalism that must always be maintained.
According to a report from the technology website Venture Beat, PayPal CEO David Marcus wrote a critical letter to his employees blaming them for not using PayPal products and encouraging them to leave if they didn’t have the passion to use the products they work for.
According to the website, part of the leaked letter reads:
“It’s been brought to my attention that when testing paying with mobile at Cafe 17 last week, some of you refused to install the PayPal app, and others didn’t even remember their PayPal passwords.That’s unacceptable to me, and the rest of my team, everyone at PayPal should use our products where available.That’s the only way we can make them better, and better.”
“In closing, if you are one of the folks who refused to install the PayPal app or if you can’t remember your PayPal password, do yourself a favor, go and find something that will connect with your heart and mind elsewhere.”
While not obvious at first, the letter reveals a problem of morale and culture at PayPal.As an executive, you certainly want your employees to use and promote your products.However, when faced with a situation where staff isn’t embracing what they make, you need to investigate the root of the problem -- not threaten.
When faced with internal problems, good executives start by asking “why”.They reach out to their executive team first and then to the entire staff to find the root of a problem and how to fix it.Sending out a one-sided note about the problem is not leading, it’s retreating.
Leadership starts by listening.Good executives need to get out among the staff and ask questions and listen without judgment or reaction.The fact that company employees are not embracing and using its products is a failure of leadership that Marcus needs to address by self-reflection.At the end of the day, if his employees have to be forced to use the app, how can he expect consumers to want to willingly pay to use it？ Marcus should have focused on three questions:
• Why are you not using the app？
• What is it that we can do to ensure you use our app？
• What do you need from me？
1.A CEO only needs to be passionate and enthusiastic.()
2.It is not professional that PayPal CEO blames his employees not to use PayPal or forget PayPal passwords.()
3.“A one-sided note” refers to the root of PayPal’s problem.()
4.When faced with internal problems, good executives find the root of a problem in their executive team first.()
5.Good executives need to give feedback immediately when they are listening to the staff.()
第7题
Proponents of seat belts on school buses believe that______.
A．the use of seat belts can stop the death and injury
B．seat belts can make children quiet when the bus driver is working
C．seat belts can help children realise the importance of using them in moving vehicles
D．seat belts can teach children lessons about the importance of keeping away from drivers
第8题
Maria Mitchell(1818-1889,the first woman astronomer(天文学家)in the United States, was born in Nantucket. Massachusetts. Her parents valued education and insisted on giving her the same quality of education that boys received.
Her father. William Mitchell, was an astronomer and teacher himself. When he built his own school, Maria became a student and also a teaching assistant to him. At home. Marias father taught her to watch the stars and other natural objects in space using his personal telescope(望远镜).
Later she went to work at the library of the Nantucket Atheneum. Over the next tweny years. she further developed her interest in reading as many books as she could.She spent her nights watching the sky closely with her father.
On October 1, 1847,Maria discovered a comet(彗星 )by merely using a two-inch telescope. Some years before, King Frederick VI of Denmark had set up prizes to each discover of a"telescopic comet". The prize was to be given to the"first discoverer"of each such comet because comets were often discovered by more than one person.
There was once a question of who should be the winner. As the story goes, francesco de Vico had discovered the same comet two days later, but had reported it to the European vor. She won the prize in 1848 and became a big name the world over. The comet was named“ Miss mitchell&39;s Comet.”
What ean be learnt about Marias parents according to the text？
A.They came from low-income families.
B.They gave Maria equal chance for education
C.They were both astronomers
D.They were both teachers.
When did Franeeseo de Vico discover the comet？A.In1818
B.In1889
C.In1848
D.In1847
What problem did Maria meet with in winning the prize？A.She named the comet on her own
B.She did not use the required telescope.
C.She did not report her discovery in time
D.She discovered the comet with her father
Whe played the most important role in Maria's great achievement？A.King FrederickⅥ
B.Francesco de Vico
C.Her father
D.Her mother
请帮忙给出每个问题的正确答案和分析，谢谢！
第9题
For some time past it has been widely accepted that babies-and other creatures-learn to do things because certain acts lead to “rewards”; and there is no reason to doubt that this is true. But it used also to be widely believed that effective rewards, at least in the early stages, had to be directly related to such basic physiological (生理的)“drives” as thirst or hunger. In other words, a baby would learn if he got food or drink or some sort of physical comfort, not otherwise.
It is now clear that this is not so. Babies will learn to behave in ways that produce results in the world with no reward except the successful outcome.
Papousek began his studies by using milk in the normal way to“reward” the babies and so taught them to carry out some simple movements, such as turning the head to one side or the other. Then he noticed that a baby who had had enough to drink would refuse the milk but would still go on making the learned response with clear signs of pleasure. So he began to study the children's responses in situations where no milk was provided. He quickly found that children as young as four months would learn to turn their heads to right or left if the movement“switched on” a display of lights-and indeed that they were capable of learning quite complex turns to bring about this result, for instance, two left or two right, or even to make as many as three turns to one side.
Papousek's light display was placed directly in front of the babies and he made the interesting observation that sometimes they would not turn back to watch the lights closely although they would“smile and bubble” when the display came on. Papousek concluded that it was not primarily the sight of the lights which pleased them, it was the success they were achieving in solving the problem, in mastering the skill, and that there exists a fundamental human urge to make sense of the world and bring it under intentional control.
According to the author, babies learn to do things which______.
A．are directly related to pleasure
B．will meet their physical needs
C．will bring them a feeling of success
D．will satisfy their curiosity
第10题
Most people believe that they are a reasonable judge of character and trust their instinctive feelings.We might use some kind of test to aid the selection process, but we usually pick a candidate who interviews well, has good qualifications and an impressive work record.
But suppose the candidate lies or is less than completely honest.“This can be a serious problem for employers,” explains Alan Conrad, Chief Executive at Optimus Recruitment.“The most difficult liars to find are those who tell halftruths rather than complete lies.” Research shows that up to 75 percent of resumes are inaccurate on purpose.The most common practice is omission.
Interviewer should therefore concentrate on areas of uncertainty such as gaps between periods of employment and job descriptions that seem strange.“Focusing on these areas will force candidates to tell the truth or become increasingly dishonest.This is usually when people show their anxiety by their body language.Sweat on the upper lip, false smiles and nervous hand movements all indicate discomfort.”
Conrad does not suggest an aggressive policystyle. interview technique, but insists that close inspection of a resume is absolutely essential.Only by asking the right questions can you confirm the suitability of the candidate or put pressure on those who are being less than completely honest.
1.The best title of this passage can be ______.
A.Disadvantages of Job Interviews
B.Advantages of Job Interviews
C.How to Catch Out the Dishonest Candidate
D.How to Find a Job by Tricks
2.The liars hard to recognize are those who tell ______.
A.partial truths
B.mainly truths
C.complete truths
D.complete lies
3.How were the job applicants able to lie without being detected？
A.By using their body language
B.By telling some unbelievable lies
C.By leaving out some necessary information
D.By providing more information than needed
4.In order to pick up a qualified and an honest candidate, Conrad suggests that we ______.
A.correct the resumes intentionally
B.compare one’s resume with others
C.examine the resumes carefully
D.inspect the candidates aggressively
5.What is the author’s attitude towards job interviews？
A.Suspicious
B.Credulous
C.Most objective
D.Too subjective
