题目内容
某工程，业主在招标文件中规定：工期T(周)不得超过80周，也不应短于60周。 某施工单位决定参与该工程的投标。在基本确定技术方案后，为提高竞争能力，对其中某技术措施拟定了三个方案进行比选。方案一的费用为C1=100+4T；方案二的费用为C2=150+3T；方案三的费用为C3=250+2T 这种技术措施的三个比选方案对施工网络计划的关键线路均没有影响。各关键工作可压缩时间及相应增加的费用见表6-2。 表6-2各关键工作可压缩时间及相应增加的费用 关键工作 A C E H M 可压缩时间/周 1 2 1 3 2 压缩单位时间增加的费用/(万元/周) 3.5 2.5 4.5 6.0 2.0 假定所有关键工作压缩后不改变关键线路。 问题 该工程采用问题1中选用的技术措施方案时的工期为80周，造价为2653万元。为了争取中标，该施工单位投标应报工期和报价各为多少
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Who should be responsible for the loss according to the letter
It’s Friday night, and you want to watch a movie at home with that special someone. You could go to a video store and rent a film, and instantly it’s yours; popcorn extra. Or you could go to Netflix, and the movie will arrive, earliest, on Tuesday. Here’s hoping you had a Plan B for your big date. Ah, but you love Netflix, the online rental service that delivers movies and TV shows to your mailbox. Since its start in.1999, the company has sent more than 2 billion discs to its 10.6 million subscribers, who return them in the familiar red envelopes for more titles. As a professional or obsessive movie watcher, I find Netflix a helpful reference source for my never-ending entertainment education. But I have misgivings about the service’s usefulness, especially compared with that of a real, well-stocked video store, and about the possibly harmful effect that Netflix and other online retail outfits may have on American society. No question, Netflix serves a need. It’s a virtual video store with more than 100,000 titles — movies and TV shows. And it’s cheap: for the four-at-a-time price of $ 23.99, you could conceivably see about 50 videos a month — if you devoted your life to the task. In a deep recession, Netflix has also taught film fans that renting a movie or TV series not only is way less expensive than buying but also takes up no shelf space when you move from your foreclosed home into your parents’ basement. That could be one reason DVD sales declined 13.5% in the first half of 2009, while Netflix revenues were up 21% in the year’s second quarter. At the same time, movie attendance has surged 8% this year. People are watching more, owning less. A Netflix ad has one contented couple purring, "We don’t miss the video store at all." Well, I do. Specifically, I miss Kim’s Video, a lower-Manhattan movie-rental landmark that housed 55,000 DVDs and cassettes of the vastest and most eccentric variety — until it closed early this year and shipped the whole stash to Sicily. Admittedly, Kim’s was one of the gems, but cities large and small used to have video stores with all manner of movies that you could see right away. With Netflix, you surrender those basic American rights: impulse choice and instant gratification. You must cool your jets for two to four days, dependent as you are on both the skill of Netflix employees to put the correct movie in your envelope (sometimes they don’t) and the speed of the U.S. Postal Service. By the time a video arrives, you may have forgotten why you rented it. What is the passage probably going to talk about in the following part
The world output of crude oil that year was 25 percent (high)______than the precious year.
A new survey of medical-school deans finds that unprofessional conduct on blogs and social-networking sites is increasing among medical students. Although med students fully understand patient-confidentiality laws and are indoctrinated in the high ethical standards to which their white-coated profession is held, many of them still use Internet to make discriminatory statements and discuss patient cases in violation of confidentiality laws, according to the survey. We assumed that students were "educated about professional conduct online and used better judgment." But medical students, it seems, are no different from the rest of us when it comes to posting drunken party pictures online or tweeting about their daily comings, goings and musings — however inappropriate they may be. Many students feel they are entitled to post what they wish on their personal profiles, maintaining that the information is in fact personal and not subject to the same policies and guidelines that govern their professional behavior on campus. Though medical students would agree that physicians — and other professionals, like teachers — should be held to a higher standard of integrity by society, the new study suggests that they’re confused by how rules apply, especially in cyberspace, once the white coat comes off. "They think it’s something only for their friends, even though it’s not private." says Dr. Neil Parker, senior associate dean for student affairs for graduate medical education at UCLA’s David Geffen School of Medicine. That attitude is largely dictated by age, says Parker. In focus groups involving students, faculty, administrators and staff, the school has found a clear generational divide between those who tend to blur the line between their personal and professional lives and those who don’t. Younger students were more likely than older staff members to believe that their thoughts and opinions were valid to post online, regardless of their potentially damaging or discriminatory impact on others. The issue is especially relevant when it comes to discussing patient cases. Laws prohibit doctors from talking about patients using individually identifiable information. However, as Parker notes, sharing patient care experiences can be a useful and powerful learning tool for medical students that encourages "reflection, empathy and understanding," he writes in the paper. Although discussing their experiences online may be allowed, students must be made aware that identifying information is not limited to patients’ names and that divulging other characteristics and details often violates patient-privacy laws. It’s that type of education that medical schools need to include more in their curricula. Ensuring that students are aware of privacy settings on social-networking sites is another. "Most students want us to provide them with education and guidelines, but not policies. It is a different culture; we always say we have to be culture-sensitive to our patients, but we have to be culture-sensitive to our students as well." Parker says. What is the benefit of discussing patient case
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