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【简答题】
小体积沉淀分离法一般是在尽量小的体积和尽量大的浓度下，同时又有大量没有干扰作用的______存在下进行的。由于______，所以得到的沉淀含水量少且比较紧密。
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反馈参考答案：
举一反三
【单选题】British youths ______.
A.
are trying to find work on the continent
B.
are sympathetic with the unemployed on the continent
C.
show their concern for unemployment in France and Belgium
D.
have been the first to show their disappointment over joblessness
【单选题】______ is at the center of the British political system .
A.
The Cabi net
B.
The House of Lords
C.
C . The House of Commons
D.
The Privy Council
【单选题】What is the root cause of the poor service at British airports according to the British Airport Authority?
A.
Inefficient management.
B.
Poor ownership structure.
C.
Lack of innovation and competition.
D.
Lack of runway and terminal capacity.
【单选题】Which of the following is not a British newspaper?
A.
The Daily Telegraph
B.
The Daily Mail
C.
TIME
D.
Glasgow Herald
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