According to the passage, which of the following was a possible motive for the cultivation of plants in eastern North America()
A. Lack of enough wild food sources
B. Tile need to keep trees from growing close to settlements
C. Provision of work for an increasing population
Desire for the consistent availability of food
查看答案
The word "intriguing" in line 5 is closest in meaning to()
A. changing
B. perfect
C. visible
D. fascinating
The word "Ultimately" in line 14 is closest in meaning to()
A. frequently
B. normally
C. whenever possible
D. in the end
施工组织总设计的主要内容中点定为关键的是()。
A. 施工部置和施工方案
B. 施工总进度计划
C. 施工准备及资源需要量计划
D. 主要技术组织措施和主要技术经济指标
The word "enhancement" in line 20 is closest in meaning to()
A. replacement
B. design
C. improvement
D. decoration