题目

---Why did she____________ your invitation? ---Because she had an important meeting to attend that day. A.turn down     B.put away     C.look up     D.hand in 答案：A 化学与日常生活密切相关，下列说法错误的是(　　) A．碘酒是指单质碘的乙醇溶液 B．84消毒液的有效成分是NaClO C．浓硫酸可刻蚀石英制艺术品 D．装饰材料释放的甲醛会造成污染