创建一个接口的正确路径是什么?
A. CONTROLLER>Interfaces>New
B. CONTROLLER>Inventory>New Interface
C. INTERFACES>New
D. CONTROLLER>Ports>New
生态系统中,磷损失的主要途径是有机物燃烧。()
A. 正确
B. 错误
Chinese paper was made from
A. the hair-like parts of certain plants.
B. the wood of trees.
C. the skin of certain young animals.
D. the stem Of tall plants.
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