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【简答题】
组分A从色谱柱流出需15.0min,组分B需25.0min,而不被色谱柱保留的组分P流出柱需2.0min。 (1)B组分对A组分的相对保留时间是( )。 (2)A组分在柱中的容量因子是( )。 (3)B组分在柱中的容量因子是( )。
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反馈参考答案：
举一反三
【简答题】按从大到小排列各数。 31，72，24，35，58，96，66，44
【判断题】London dialect began to spread as Standard English in the Middle English period. [2.2.2]
A.
正确
B.
错误
【单选题】Which of the following factors did not contribute to the London dialect becoming standard English?
A.
The court moved from Winchester to London.
B.
The dialect was used by educated people.
C.
The dialect remained unaffected by foreign trade.
D.
The dialect was gradually spoken by more and more people.
【单选题】London dialect was once disseminated throughout the country NOT because London was ——.
A.
a commercial center
B.
a political center
C.
a printing center
D.
a linguistic center
【简答题】竖式计算 62×77= 47×34= 18×90= 35×23= 65×44= 70×36=
【单选题】It was _________ who made London dialect the foundation of the modern English speech.
A.
Chaucer
B.
Shakespeare
C.
Wyatt
D.
Boccaccio
【单选题】The name “the father of English poetry” was given to who was born in London about 1340 and did much in making the dialect of London (Midland dialect the language of the court, the learned and the well...
A.
Shakespeare
B.
Spenser
C.
Philip Sidney
D.
Chaucer
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