【简答题】Builders usually add insulation to homes and offices. The insulation can reduce the 7________ demands of heating and cooling systems. Dieckman and Robinson won several awards for their prototype insul...
【简答题】I arrived in London at last. The railway station was big, black and dark. I did not know the way to my _1 ___(旅馆), so I asked a porter. I not only spoke English very carefully, but very clearly as 2. ...