为解决现代厨房火灾隐患,美国安素公司于二十世纪六十年代专门研制生产出了用于厨房的灭火系统。该灭火系统自问世以来,得到了广泛......

The St. Lawrence Seaway connects Lake Superior, Lake Huron, Lake Michigan, Lake Erie and Lake Ontario to the Atlantic Oc......

The destruction of the South Vietnamese rice (<em>Oryza sativa L</em>) crop using an arsenic-based herbicide known as Ag......