【判断题】A fixed cost is fixed only in relation to a given wide range of total activity or volume and only for a given time span, usually a particular budget period.
【简答题】句型展示台。 1. 我来自北京。 I _____ _____ Beijing. 2. 北京是个大城市。 Beijing _____ a big _____ . 3. 我不是英国人。 I'm _____ English. 4. 我和大明、玲玲在一班。 I _____ _____ Class One _____ Da Ming and Ling Ling.