Which of the following statements about chemical hazards is TRUE? Most effects of chemical hazards on humans who come into contact with
them become apparent within a half an hour.
Chemical contaminants can be contained by observing safe cooking
temperatures.
In many cases, the impact of chemical contaminants on people's health is
not immediately apparent.
Antimony is an illness caused by consuming a beverage dispensed by
copper tubing

Thom bell , bobby martin , and norman harris .

The gregorian chant was a major cultural milestone in the middle ages. it was one of the first codified forms of music meant to be played as written, where previously it was difficult to mass-produce and disseminate any music. what's more, these chants were also some of the first examples of musical notation: the notes and bars of today's music sheets are a reflection of centuries of evolution beginning with these chants. it became official throughout the entirety of the catholic church, meaning that nearly all of europe followed this musical notation and styling.