题目

. Just hang the towel ______ the back of the chair so that it will dry soon. A.over                B.for                   C.with                    D.through 答案:ACO和H2混合气体3 g和足量的氧气燃烧后,在150℃时将混合气体通过足量的Na2O2后,Na2O2增重的质量为A.1.5 g B.3 g C.6 g D.无法计算
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