问题
单项选择题
下列建筑外窗的传热系数（）最小。
A.单层塑框双玻
B.单层钢框双玻
C.单层塑玻
D.单层钢玻
答案
参考答案：A
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下列建筑外窗的传热系数（）最小。
A.单层塑框双玻
B.单层钢框双玻
C.单层塑玻
D.单层钢玻
参考答案：A
| 从对话后的方框中选择适当的选项补全对话。 | |
| A: Summer vacation is coming. 1______ B: Well, I'd like to visit my grandparents in Dalian. A: Really? Dalian is a beautiful city. When are you leaving? B: I'm leaving next week. 2______ A: Oh, I'd like to go sightseeing in Sichuan. B: That's great. Sichuan is a good place to travel. How are you going there? A: By train. By the way, how long are you staying in Dalian? B: For two weeks. 3______ A: My parents. They are both teachers. They are free in summer. B: 4______ A: You, too!
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