38. She _____________ Souuth America at the age of 15 and he has never returned.
A. leaves
B. left
C. has left
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39. Would you like a cup of tea?_______________. A glass of water will do.
A. I think so
B. No, thank you
C. Yes, please
40. When I was a child, I would spend hours every day ______________ the piano.
A. play
B. playing
C. played
关于围护结构温差修正系数a值的大小，下列说法错误的是（ ）。
A. 围护结构温差修正系数的极值是1
B. 非供暖房间保温性能越差，温差修正系数越大
C. 非供暖房间保温性能越好，温差修正系数越大
D. 非供暖房间透气性能越好，温差修正系数越大
相邻房间供暖设计温度不同时，下列（ ）情况不需要计算隔墙和楼板的传热量？
A. 温差大于或等于5℃
B. 温差大于或等于5℃但传热量不大于高温失热房间供暖负荷的10%
C. 温差小于5℃且传热量不大于高温失热房间供暖负荷的10%
D. 温差小于5℃但传热量不小于高温失热房间供暖负荷的10%
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