in the presence of an acidic catalyst such as p-toluene sulphonic acid.ALSO:Polymers of ethylene are cross-linked by incorporating a minor amount of a di-(aralkyl) peroxide of the formula where R1 and R6 are aryl or alkaryl groups and R2, R3, R4 and R5 are hydrogen or alkyl groups...
In the year 2000 the first of a new class of distant solar system objects was discovered, orbiting the Sun at a distance greater than that of Neptune: the "extreme trans Neptunian objects (ETNOs). Their orbits are very far from the Sun compared with that of the Earth. We orbit the Sun...
a出题的小姐是头小猪猪 Sets the topic of a composition young lady is the young pig pig[translate] a和他说再见 正在翻译,请等待...[translate] a单面条锁 Single noodles lock[translate] aenergy-intensive industries 能源消耗量大的产业[translate] ...