色谱分离法在工业上应用色谱分析原理分离性质近似组分的方法。使溶液分批通过垂直的填充吸附剂固定床，将各种组分分离精制。色谱柱内的填充吸附剂是多孔的惰性固体，用非挥发性的惰性液体涂渍。被分离溶液的溶质与惰性液体有大小不同的溶解度。
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Which of the following statements is not true about the UK economy？
A. Britain remains one of the Group of Seven large industrial economies
Britain has experienced a relative economic deline since 1945
C. There has been a period of steady decreasing of living standards.
D. some smaller economies have overtaken the UK in the terms of ourtput per capita.
which of the following was not the reason for the relative economic decline since 1945?
A. Britain did not invest in modern equipment and new products
Britain spend a high proportion of its national wealth on the military
C. Britain had been heavily in debt to finance the war
D. Britain had carried out the nationalisation of the business
which of the following livestock has the biggest number in the UK?
A. Beef cattle
B. dairy cattle
C. chicken
D. sheep
where is the best agricultural land in Britain ?
A. In the southeast of England
B. in the northeast of England
C. in the southeast of Scotland
D. in the northeast of Scotland
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