题目

—It's many years since I saw you last; I _______ you at all. —I wouldn't have, either, if someone _______ you by the name. A . haven't recognized, didn't call B . didn't recognize, didn't call C . didn't recognize, hadn't called D . recognized, had called 答案：C体积是30cm3的空心铜球质量m＝178g，空心部分注满某种液体后，总质量m总＝314g，问注入的是何种液体？