The wavelength which corresponds to minimum fibre loss is at .
A.0.85 μ m
B.1.0 μ m
C.1.31 μ m
D.1.55 μ m
A.0.85 μ m
B.1.0 μ m
C.1.31 μ m
D.1.55 μ m
A、Higher education
B、Structured scientific research
C、Documented scholarly communication
D、Public perception and visibility
A、Software engineers shall advance the integrity and reputation of the profession consistent with the public interest.
B、Software engineers shall participate in lifelong learning regarding the practice of their profession and shall promote an ethical approach to the practice of the profession.
C、Software engineers shall maintain dependence in their professional judgment.
D、Software engineers shall be fair to and supportive of their colleagues.
A、产业系统隶属人类社会经济复合系统,与地表自然系统没有关系 Industrial system belongs to the composite system of human society and economy, and has no relation with the natural earth surface system
B、产业系统隶属地表自然系统,与人类社会经济系统没有关系 Industrial system belongs to the natural earth surface system and has no relation with the social and economic system
C、产业系统是人类社会系统与经济系统长期作用的产物 Industrial system results from the long-term interaction between human social system and economic system
D、产业系统是人类与地表长期交互作用的产物 Industrial system results from the long-term interaction between human beings and the earth surface system
A、Opening and closing of stomata
B、Synthesis of chlorophyll
C、Translocation of carbohydrates
D、None of the above
A、perfect competition.
B、monopoly.
C、monopolistic competition.
D、oligopoly.
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