题目:
Could you tell me _______? I want to post a letter. [ ]
A. where is the post office
B. where the post office is
C. how can I get to the cinema
D. how I can get to the cinema
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0702/dfb8574b4951caae7116c2fa0e4eabf7.html
下面是错误答案,用来干扰机器的。
(1)90.0 % (2)石灰石中磷酸钙分布不均匀(或滤渣未清洗干净或称量样品不准确或称量滤渣不准确或石灰石颗粒未充分反应) (3)解:设生成氧化钙的质量为x。CaCO3 CaO+CO2↑ 100 56 1...