The implications of disinfection by-products (DBPs) present in drinking water are of public health concern because of their potential mutagenic, carcinogenic and other toxic effects on humans.张老师:我看文献看到这么一句话,我的理解它大体意思说:我们的日常饮用水都...
...nglish for 3 years;到现在,他已经在武汉住了5年,He has lived in wuhan for 5 years"。二,用于某一动作从过去到现在一直反复发生。如:“他一向都是骑车上班,He has always gone to work by bike;他老是放学后看电视,He has always watch TV after ...
one painting that he did finish was that Mona Lisa,one of the world's most famous paintings.这句话中the world's most...中the和名词所有格world’s都是中位限定词,不是排斥的吗?为什么可以连用呢?