题目

如图所示是盒装牛奶，若该牛奶的密度是1.2g/cm3 ， 则牛奶的质量为g．喝掉一半后，牛奶的密度为kg/m3。 答案：【1】300【2】1.2×103Our teacher requested that strange signs around us ____be ignored before an earthquake.A. couldn’t B. mustn’tC. would not D. not