Which two parts of the body are damaged by bilharzia w a)
b)
Which water-borne disease can be prevented by drainin
Nhich disease has the following signs and symptoms:
Violent diarrhoea with mucus or rice water
Abdominal pain
The main sign and symptoms of bilharzia is
The best way to transport water in a long distance is
Making fountains is use of water in
living chemicals like acaricides is use of water in​