第10题: [单项选择]Questions 18~21 are based on the following dialogue between a customer and a shop assistant.How much does the shop assistant offer to reduce at first A. Fifty dollars. B. Five dollars. C. Two hundred dollars. D. Seventy-five dollars. 参考答案:A
第11题: [单项选择]填埋场址地质屏障作用不包括()。 A. 隔离作用 B. 阻隔和阻滞作用 C. 去除作用 D. 降解作用 参考答案:D