题目

与3.2gSO2所含的氧原子数相等的NO2的质量为（ ） A . 3.2 g B . 4.6 g C . 6.4 g D . 2.3 g 答案：DShe can’t with you. She homework now.A. go; do B. going; doingC. go; is doing D. going; is doing