A-A+
When are windows the weak link in a building？
问题详情
When are windows the weak link in a building？
A In the cold winter.
B In the hot summer.
C When air conditioners are turned on.
D Both A and B.
参考答案
参考答案：D
【解析】短文第三段的第一句说：windows are the weak link in a building，接下来是对这句话分寒冬和炎夏做了说明。所以D是正确选择
