题目内容

I'll then pose some of the questions and the challenges we are facing in the area of ________ in sustainability.

A. accessed
B. access
C. accessing
D. accession

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Sometimes our guests don’t like to go to the restaurant after a day’s trip. Then they can order food by the hotel service booklet over the phone. So there comes ______.

A. laundry service
B. message service
C. food service
D. room service

There are five procedures for taking room service.

A. 1.Greetings.
B. 2. take orders.
C. 3. ask the guest’s name
D. 4. repeat the guest’s order.
E. 5. extend best wishes.

美式早餐较为丰盛，主要包含

A. 水果或果汁
B. 米饭
C. 各式不同做法的蛋
D. 吐司
E. 咖啡或茶

已知：某企业的甲产品１－８月份的产量及总成本资料如下表所示：那么，采用高低点法进行成本性态分析，构建的模型为（）；若9月份的销售量是30吨，9月份的成本为（）元。如果采用回归直线法进行成本性态分析，构建的模型为（）；9月份的成本为（）元。(请保留一位小数)