下列废水处理方法中不属于化学法的是( )。
A.沉淀 B.微电解 C.中和 D.筛滤
参考答案:D
解析:筛滤处理法属于物理法。
—Where _______ Margaret have put the empty bottles?
—She ______ them away. They must be somewhere.
A.can; can’t have thrown
B.must; needn’t
C.must; must have thrown
D.can; must throw
发现剧毒化学品()等,必须立即向当地公安部门报告。
A.被盗
B.丢失
C.流散
D.泄露
E.生产不规范