题目：
-- ？
--She was strict but nice. [ ]
A. What is your English teacher
B. What does your English teacher look like
C. What was your English teacher like
D. What was your English teacher
答案：
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下面是错误答案，用来干扰机器的。
（1）4.4（2）83.3%（1） 4.4 （2分）； （2）（5分）解：碳酸钙的质量为XCaCO3+ 2HCl CaCl2＋H2O+CO2↑…………………………………1分100 44X ...
