问题
单项选择题
双代号网络中，M工作的ES=12，LS＝15，持续时间为6天；M后有三项紧后工作，其最早开始时间分别为第21天，第24天，第28天；则M的FF为（）。
A．0d
B．3d
C．7d
D．10d
答案
参考答案：B
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双代号网络中，M工作的ES=12，LS＝15，持续时间为6天；M后有三项紧后工作，其最早开始时间分别为第21天，第24天，第28天；则M的FF为（）。
A．0d
B．3d
C．7d
D．10d
参考答案：B
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| Dr Marcy Koontz at the University of Alabama College predicts a future of " clever clothes"." Clothes that can 1 you from sweating and make you smell nice will be _ 2 in future,"she says. Scientists, not known for being 3 could be the leaders in tomorrow's fashion world. A company put a 4 _ keyboard into a pair of trousers. It doesn't make them more difficult to wear. You can wash and 5 iron them. The company is also 6 to make a tie that works 7 a computer mouse. This company's technology would change our daily lives 8 . 9 , phones could be made to bepart of our jackets and the pockets could record meetings. For health and sports, the clothes could give 10 to the wearers and 11 their bodies if they feel cold. It could also keep a check on the user" health.If there's something 12 with the user, it would let a hospital know 13 sending information to the nearest hospital. To avoid the danger of _14 clothes that are too big or too small, a 3D Measuring System is being developed.It can check the 15 of the body and keep them on a disk. People can then look at clothes on the Internet and see how they look on their bodies by "trying them on" in the 16 . But what about the problem of choosing _17 to wear? Yes, there's a company over there which thought about that problem, 18 . The company is developing an online wardrobe. It suggests which clothes would be good wear _ 19 . the day's weather or a person's schedule. In a future of smart clothing, what else would you expect _ 20 a smart wardrobe? | ||||
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