In 1900, the world's use of paper was about ______ for each person in a year.
A. 50 kilograms
B. I kilogram
C. 5 kilograms
D. 15 kilograms
查看答案
种群平衡是指种群的出生率和死亡率相等。()
A. 正确
B. 错误
二氧化碳和氮气都能直接参与植物的生理代谢。()
A. 正确
B. 错误
You have to see these changes in______: they're part of a larger plan.
A. precedence
B. context
C. assortment
D. coverage
下列哪个命令用于保存来自Cisco控制器CLI的配置?
A. wr em
B. copy run start
C. save config
D. Save