BACKGROUND: HIV transmission among men who have sex with men (MSM) has become an increasing concern in China. Money boys (MBs) are a subgroup of MSM who sell sex to men. Direct comparison of HIV prevalence and related risk factors between MB and noncommercial MSM (ncMSM) has rarely been...
The guiding principle is that, while PNAS retains copyright, anyone can make noncommercial use of work in PNAS without asking for permission, provided that the original source is cited. For commercial use PNAS approves requests on an individual basis and may ask for compensation. 展开 ...
Bulens, AnneleenVan Beirendonck, SanneVan Thielen, JosDriessen, BertESApplied Animal Behaviour ScienceBULENS A., VAN BEIRENDONCK S., VAN THIELEN J. et DRIESSEN B. (2013) The Enriching Effect of Non-Commercial Items in Stabled Horses. Appl. anim. Behav. sci., 143, (1), 46-51...
In Europe, where forestry is ecologically more advanced, the noncommercial tree species are recognized as members of the native forest community, to be preserved as such, within reason.相关知识点: 试题来源: 解析 正确答案:在林业生态更为发达的欧洲,没有商业价值的树种被合理地看成是当地森林群落的...
Genetic diversity at the MHC and non-MHC loci was investigated in three commercial broiler chicken pure lines. The MHC class II and IV loci were evaluated ... MG Emara,H, Kim,J, Zhu,... 被引量: 0发表: 2020年 Sea ice-associated diet change increases the levels of chlorinated and bromi...
Commercial interventions seeking to promote fruit and vegetable consumption by encouraging preschool- and school-aged children to engage with foods with 'a... P Dazeley,C Houston-Price,C Hill - 《British Journal of Nutrition》 被引量: 30发表: 2012年 Home enteral nutrition recipients: patient pers...
Table 19.The influence of private large shareholders on the non-performing loan ratio.This table reports the results of OLS regression analyzing the influence of private large shareholders on the non-performing loan ratio of city commercial banks. The dependent variablesNPLandIndNPLare the overall no...
0.09-0.12 Qualifed 8 Breaking Strength N Thickness≥7.5mm, not less than 1300N 2036N Qualifed 6 Rupture Modulus Mpa Average≥35 Mpa individual ≥32 40.6 Qualifed 39.10~40.60 Qualifed 7 Resistance to surface abrasion of glazed tiles - Report abrasion class and cycle...
Female sex workers are less likely to use condoms with noncommercial male partners than clients. We compare noncommercial male partners who do and do not i... AM Robertson,JL Syvertsen,LA Palinkas,... - 《Sexually Transmitted Diseases》 被引量: 12发表: 2013年 Analysis of Public-Use Data ...
For the class of functions , where is a linear differential operator of the second order whose characteristic polynomial has on... VT Shevaldin - 《Proceedings of the Steklov Institute of Mathematics》 被引量: 2发表: 2006年 SOME CONTRIBUTIONS TO MULTIPLE DECISION (SELECTION AND RANKING) PROCEDURE...