酸水法提取生物碱是常用的提取方法，要求生物碱具有碱性，常用的酸有：盐酸、硫酸、醋酸等，该方法提取生物碱的主要原理是
A
暂无解析
All plays are alike to me just as all music is alike to Tony.（）
For electoral purposes Britain is divided into 659 constituencies, each of whichreturns ________to the House of Commons.
Which of the following is not true about Canada's manufacturing today?
我就担心丧失机会。不抓呀，看到的机会就丢掉了，时间一晃就过去了。（）
The old couple have been married for 40 years and never once _______ with each other.
Happiness doesn ’t alway s _______ money.
______ of a sentence depends on the context in which the sentence is uttered.
What are Ireland's chief exports?
I was writing a report last night; ________ I would not have stayed up late.
This is the most beautiful village _______ I visited these years.