Letters in Applied Microbiology 1996, 23,41241 6 Bacterial outputs from ponds and tanks used in intensive fish farming M.S. Bedwell and R. Goulder Department of Biological Sciences, University of Hull, Hull, UK 1090/96: received21 March 1996 and accepted 8 May 1996 M.S. BEDWELL AND R....
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题目 When John Todd was a child,he loved to explore the woods around his house,observing how nature solved problems.A dirty stream,for example,often became clear after flowing through plants and along rocks where tiny creatures lived.When he got older,John started to wonder...
In the UK and the USA, the highest speed test was 30 WPM and 22 WPM, respectively (I passed the 17 WPM test in 1989 for for my "Advanced" license). The world record is around 140 WPM. Voice/phone: 45-60 KHz; voice quality was rather low, due to the very small bandwidth of ...
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Freshwater retting is used for fully ripe coconut husks, and saltwater retting is used for green husks. 3 For freshwater retting, ripe husks are buried in pits dug along riverbanks, immersed in water-filled concrete tanks, or suspended by nets in a river and weighted to keep them ...