给水工程设计，时变化系数宜采用1.3～1.6，当（）时，应采用下限。
A、城市规模大
B、用户用水不连续
C、用户作息规律性强
D、城市规模小
参考答案：A
根据上下文补全对话,将所缺少的内容写在相应的横线上。
Tom: Hello, 86679032.
Sally: Hi, this is Sally speaking. 1. ?
Tom: Hi, Sally. It's Tom. I've heard you will go to China.
Sally: Yes. I'm looking for information about China now. I know you have a pen friend in Beijing. What does she think of China?
Tom: Oh, she thinks2. .
Sally: I'm very excited. Which places should I visit in Beijing?
Tom: She suggested 3. .
Sally: It's great. By the way, what about Chinese people?
Tom: She said4. .
Sally: Good. Thanks a lot.
Tom:5. .
土地分定等级和土地估价是从不同角度对土地的特性的评定，前者评定的是土地的使用价值，后者评定使用价值在市场上反映出的价格．
