以下关于B Lines B线的特征,错误的是()A.彗尾征(Comet tail)(多重反射伪像)的一种B.起自胸膜线,垂直发出C.边缘清晰,激光样D.弱回声E.无衰减
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Comet C/2009 beginning of a tailJohn Wunderlin
The first 1000 km of the ion tail of comet 67P/Churyumov-Gerasimenko were explored by the European Rosetta spacecraft, 2.7 au away from the Sun. We characterised the dynamics of both the solar wind and the cometary ions on the night-side of the comet's atmosphere. We analysed in situ...
This metaphoric image utilises the iconic quality of "resemblance". The discussion of the image of "comet tail" gives the author the opportunity to distinguish three varieties. One variety is static (example: round atelectasia), the other is dynamic (example: cancer of the breast) and the ...
C Haridass,CVV Prasad,SP Reddy 摘要: The comet-tail (A 2 Pii-X 2Sigma(+)) system of the molecular ion (C-12)(O-16)(+), excited in the cathode glow of a hollow-cathode discharge tube of special design, was photographed in the spectral region 3400-8500 A. Of the 17 observed ...
The Script of Life in Modern Society: Entry into Adulthood in a Changing World Professions such as medicine are in the midst of profound change. This paper explores how recent stratifying forces within the medical profession I elate t... M Buchmann - 《Sociological Forum》 被引量: 430发表:...
I will see them a year later and ask how the project is going and the answer will be, “I’m still doing research.” I call it The Blackhole of Research and many writers get sucked it. I fell into it once myself when working on a play based on Shakespeare’s Sonnets. I got ...
The anomalous tail of Comet Kohoutek is studied on the basis of the dust-tail theory formulated by Finson and Probstein for the case of negligibly small emission velocities. Theoretical photometric profiles of about 170 specific models, calculated on various assumptions regarding the distribution of...
The effect of several solar wind disturbances on the plasma tail of a comet is studied by means of MHD model calculations. In particular, high speed streams (HSS) and non compressive density enhancements (NCDE) are investigated. Interplanetary shock waves, changes of the flow direction and curren...