第11题: [单项选择]生石灰(块灰)的主要化学成分是( ) A. CaC03 B. CaO C. Ca(OH)2 D. CaSO4 参考答案:B
第12题: [单项选择]{{B}}Questions 11 to 18 are based on the conversation you have just heard.{{/B}} A. She wants to order some food. B. She is unhappy to work so long. C. She plans to have a day off. D. They will stop working. 参考答案:D 答案解析:[听力原文]
M: We’ ve worked for more than nine hours, and everybody looks tired out.
W: Okay. Let’s ca