采用新的管式反应器装置代替釜 式 反应器,将生产7-ADCA和7-ACA的副产物六甲基二硅醚有效地转化成了三甲基氯硅烷.Trimethylchlorosilane was prepared from hexamethyldisiloxane, by - product in producing 7 - ADCA and 7 - ACA.以三甲基硅醚和氯化氢气体为原料, 浓硫酸为催化剂合成了三甲基氯硅烷.Chlorotrimethylsi...
In early stages, gum disease is known as gingivitis.在早期, 牙龈疾病被称为牙龈炎.This often includes inflammation of the gums, which is called pregnancy gingivitis.常见有牙龈炎, 称之为妊娠期龈炎.the bacteria caused gingivitis引起齿龈炎的病菌Objective To c...
Not bad, I still have an angelic heart, kind - hearted, kindheartedness.还好, 我还有一颗天使的心, 善良 、 仁爱.Also has many a dream kindheartedness, is loves mischievously small lovable.又有着多啦a梦的好心肠, 是爱调皮的小可爱....
Water in the engine compartment is sucked away by a hose.发动机舱里的水由一条软管抽走。She sucked an ice cube into her mouth, and crunched it loudly.她吸了块冰块到嘴里，嘎嘣嘎嘣地大声嚼着。The air is sucked out by a high-powered fan.由强力风机把空气吸出去。...