Normal anatomy of coronary arteries, viewed from above with t he atria removed. A = aortic valve; P = pulmonary valve; T = tricuspid valve; M = mitral valve; RCA = right coronary arter y; AM = acute m
澳大利亚的文化符号有人说，澳大利亚是一个如此年轻的移民国家，根本就没有共通的文化。然而，正是这来自一百七十多个国家和地区的移民造就了澳大利亚文化的多元性和全球性。这个独具风情的“南方大陆”从来不乏多彩的文化符号：笨拙可爱的拳击袋鼠、迎风招展的金合欢花、变幻莫测的乌卢鲁岩、独具匠心的悉尼歌剧院……Australia is a land of symbols. From the curious, th
各类质谱的优缺点1.磁质谱 Benefits Classical mass spectra Very high reproducibility Best quantitative performance of all mass spectrometer analyzers High resolution High nsitivi
各类质谱的优缺点1.磁质谱 Benefits Classical mass spectra Very high reproducibility Best quantitative performance of all mass spectrometer analyzers High resolution High nsitivi
