利用水溶液在共晶点与低共熔点前,部分水分呈冰晶析出的原理,来提高提取液的浓度的浓缩方法称()。
参考答案:冷冻浓缩
Around two o'clock every night, Sue will start talking in her dream. It somewhat ________ us.
A.bothers
B.had bothered
C.would bother
D.bothered
气动夯管锤铺管中注浆系统主要由( )组成。
A.储浆罐
B.注浆头
C.注浆管
D.传压管
E.清土系统