Which of the following statements is true?
选项:
A:Since living walls are more expensive, green roofs are more popular.
B:Because of the energy-cost savings, many corporate headquarters are hanging green walls.
C:The only advantage of a green wall is that it could create a better urban environment.
D:A green wall demands extra care and concern, just like a pet.
发布时间:2024-06-20 23:59:23