如图,正方形ABCD中,点E在边BC上,且CE=2BE.连接BD、DE、AE,且AE交BD于F,OG为△BDE的中位线.下列结论:①OG⊥CD;②AB=5OG;③S△ODGS△ABE=13;④BF=OF;⑤cos∠BFE=55,其中正确结论的个数是
Time-of-flight mass spectrometer of the orthogonal acceleration type which accelerates ions incident on the orthogonal acceleration region in a direction orthogonal to the direction of the incident and sends the accelerated ions to the flight space, and determines the mass-to-charge ratio of the ...
Flux Pinning in Melt-Grown $\\bf NdBa_{2}Cu_{3}O_{\\ninmbi y}$ and $\\bf SmBa_{2}Cu_{3}O_{\\ninmbi y}$ Superconductors REBa2Cu3Oy superconductors with rare earth (RE) ions with large radii (RE: La, Nd, Sm) exhibit relatively low T c due to the presence of RE-Ba ...
Single-molecule fluorescence is a powerful tool for imaging structures below the standard diffraction limit of light. The resolution gain comes from fitting the emission of isolated fluorophores, and localization accuracy improves with number of photons detected. Here, we control single-molecule emission...
The elastoplastic damage response of the material is further characterized by elastic-plastic-damage coupling. The proposed model facilitates simulating and optimizing the mechanical characteristics of nano-silica incorporated concrete an...
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Prepositions of Place This is Tom’s room. between far from on in The telephone is ___ the TV and the lamp. 1/16 This is Tom’s room . next to on under opposite The laptop is ___the bed. 2/16 next to opposite far from on The calendar is ___ the clock. 3/16 next to bet...
The exact mechanism of the inflammatory changes occurring during the development of Behet's disease (BD) remains unclear. We investigated the role of classical (M1) and alternative (M2) activation of macrophages in a herpes simplex virus (HSV)-induced BD mouse model. The classical vs. alternativ...
This rapid extension of pharmacogenetics to all the different medical specialties is in close relation with the recent completion of the draft sequence of the human genome and the discovery that about 0.1% of its sequence is polymorphic. The goal of pharmacogenetics for the next years is clearly ...
You may doubt the security of online shopping,Li Jin said,"It's very safe and convenient (方便的).Unless you receive the products from the sellers and are satisfied with them,the shop owner will not get the money.You can also get your money back if you want to return the products." ...