A:are to blame
B:are going to blame
C:are to be blamed
D:should blame
12-8=( )
①化石燃料:煤石油天然气
②碱:纯碱烧碱熟石灰
③氧化物:五氧化二磷高锰酸钾生石灰
④常见的还原剂:氢气碳一氧化碳
⑤溶液:糖水生理盐水泥浆.
—Let's paint.
—OK.