经济学中cost lock-in effect是指成本锁定效应。()
经济学中cost lock-in effect是指成本锁定效应。()
经济学中cost lock-in effect是指成本锁定效应。()
Which of the following statements is NOT true?
A.Wood-bunting stoves are safer and more efficient than they used to be.
B.No factories exist for the purpose of producing dirty wood chips.
C.Both catalytic combustors and wood agitators save money in the long run.
D.Wood-burning stoves with catalytic combustors cost between $ 100 and $ 200.
Many researchers are currently trying to______.
A.use animals involved in research more effectively
B.slow down the transition for some experiments
C.challenge the scientific value of animal testing
D.raise the cost of using any animals in research
Which of the following statements is NOT true?
A.Wood-burning stoves are safer and more efficient than they used to be.
B.No factories exist for the purpose of producing dirty wood chips.
C.Both catalytic combustors and wood agitators save money in the long run.
D.Wood-burning stoves with catalytic combustors cost between $100 and $ 200.
A、Variations in pricing and rebates in sales
B、The bundling sale and the technological lock-in
C、Charging excessive royalties and the bundling sale
D、The technological lock-in and ruthless competitions
A.IBM's dominance was based on its proprietary lock-in.
B.Microsoft established a lucrative monopoly centered on its proprietary operating system, Windows.
C.In the new era of internet services, it is hardly possible for Google to establish proprietary lock-in.
D.Google laeked the proprietary lock-in to remain on the top of the ranking.
某功率的测量结果为5.778W,其扩展不确定度为0.24W(置信概率为95%),有效自由度为10,则该功率的完整测量结果为()。
(A)P=5.778W,U95=0.24W,νeff=10
(B)P=5.778W,U95=0.3W,νeff=10
(C)P=5.78W,U95=0.24W,νeff=10
(D)P=5.8W,U95=0.2W,νeff=10
A、
B、
C、
D、None of the above
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