According to the passage，what is one disadvantage of skyscrapers that have mirrored walls?
A. The exterior surrounding air is heated。
B. The windows must be cleaned daily.
C. Construction time is increased.
D. Extra air-conditioning equipment is needed.
正确答案：A
[解析]见第三段最后一句话“装有镜面墙的摩天楼会加热它周围空气的温度也会影响周围的建筑物”
