a找到了吗 Found[translate] aEverytime when i feel sad i just pretend to be strong with my smile or cry loudly in a place where no one is there.Life is a joke. Everytime,当我感觉哀伤我时大声地假装是强的以我的微笑或啼声在地方,没人那里。生活是笑话。[translate]...
A sample of powder was found at a crime scene. It is believed that the powder is cocaine. The only four elements in the compound were determined to be C, H, N, and O. Complete combustion of a 0.563 g sample of the unknown powder...
PROBLEM TO BE SOLVED: To provide a method and an apparatus to prepare a powder containing calcium carbide at a low temperature in which an average temperature in a reactor is approximately outside air temperature and to similarly prepare a calcium cyanamide-containing powder, and to provide the ...
It is also found desirable to construct the composite formula to reserve 5-95 percent of the total composition by weight of the unsaturated, dried paper-fiber material 10 for long fibers. Preferably, these long fibers should be “high temperature” fibers with a thermal stability measured by ...
principal agent in water purification: without chlorine, disease would be rampant, and urban living a gamble. Chemists have found ways of extracting this element from an abundant source: sodium chloride, or common salt. Yet is urban living possible without the environmental disadvantages of using ...