当今社会的四大污染是大气污染、水污染、固体废物污染和 ______污染.
根据课本定义,可知当今社会的四大污染包括大气污染、水污染、固体废物污染和噪声污染.
故答案为:噪声.
成人出现便隐血阳性时,消化道出血量至少大于()。
A.10mL
B.9mL
C.8mL
D.6mL
E.5mL
Which procedure should be followed when individuals are rescued in cold climates and suffer from hypothermia?()
A.Give them brandy
B.Keep them in motion
C.Immerse them in a warm bath (105°F,40°C)
D.Cover them with an electric blanket set for maximum temperature