| 1. | No fecal coliforms were found , however 43 . 2 % samples were found to be coliform - contaminated using the membrane filter technique , while all samples were coliform - negative with the expand ( cns ) standard method
就大肠杆菌群之检测，使用滤膜法检出43 . 2 % ，惟其菌数不多，而以中国国家标准法检测，均为阴性。 |
