Consideredanall-aroundinventorandoftenmentionedinthesam...

问题详情：

Considered an all-around inventor and often mentioned in the same sentence___41___Thomas Edison,Eli Whitney is best known___42___the invention of the cotton gin（轧棉机）in 1793 or ly put,a cotton gin is a machine that ___43___(use) to pull cotton fibers from the cotton seed（种子） cotton gin___44___(be) a pioneering invention early in the southern United States,and it had___45___great positive effect on the economies of the southern states in the cotton gin also had an___46___(equal) important effect on slavery in this re Whitney's cotton gin,___47___(raise) cotton required much labor and only a few___48___(field) could favourably raise cotton gin changed cotton into a widespread,money making and less labor-intensive（劳动密集型的）crop,leading to the rise of cotton___49___ (produce) in the Deep is different to draw a conclusion with absolute certainty that the cotton gin directly ___50___(lead) to an increase in slavery,but the cotton gin clearly was a major factor contributing to slavery issues in the South.

【回答】

41. as    42. for   

43. is used   

44. was    45. a   

46. equally   

47. raising/to raise   

48. fields    49. production   

50. led

知识点：语法填空

题型：未分类