The gases which are used by drivers as an artificial atmosphere are helium and_____________?

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Fuzzy logic is a part of_________________?

A. Aristotle’s philosophy B. Computer science C. Epicurianism D. Sophism...

Which of the following chemicals is not found in tobacco smoke?

A. Chlorine bleach B. Rocket fuel C. Nail polish remover D. Barbecue lighter fluid...

At what time of day is the relative humidity normally at a minimum ________________ ?

A. When the air temperature is highest B. Just before sunrise C. About midnight D. When the air temperature is lowest...

Types of bones in human body are: Long, short, irregular and ____________?

A. Flat B. Medium C. Regular D. Rough...

Ozone layer is affected by which harmful gas?

A. Chloro carbon B. Floro carbon C. Chloro floro carbon...