Sandstones are, as a rule , interbedded with shales.砂岩通常都与页岩互层.Oil - yielding organic matter is contained in the shales.在这些页岩里有产油的有机物质.Alternating sandstones and shales are regarded as important.蚀变的砂岩和页岩是很重要的....
Furunculosis is usually due to Staphylococcus aureus.疖病常常由金黄色葡萄球菌所引起.Staphylococcus aureus is a common pathogen found in human and animals.金黄色葡萄球菌是一种常见的人兽共患病的病原菌.Results: Cefradine sterile examination of Staphylococcus a...