A:①②③
B:①②④
C:①③④
D:②③④
比一比,再组词。
旷____ 调____ 怀____
矿____ 凋____ 杯____
烧杯中盛满一定浓度的醋酸溶液(溶液密度约为1 g/cm3),全部倾倒后烧杯内仍残留0.5 mL溶液,用每次20 mL蒸馏水冲洗了2次,此时烧杯中残留的醋酸溶液的浓度约为原先的( )
下列与预防蛔虫病无关的卫生习惯是( )
Sara, my colleague, has been ______ the run all week preparing for her son's wedding.