________ is the most critical component of ordinary fires, because it is essential for combustion.
A) Helium
B) Carbon
C) Oxygen
D) None of the above
C) Oxygen
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In severe cases, varicose veins can ________
a. rupture b. form open scores c. both a and b d. neither a nor b
A damaged heart or conditions preventing the filling of the heart leads to the development of _____shock
a. low-volume b. high-volume c. mechanical d. vasovagal
Before entering a community, researchers should study:
a. economic and social conditions in the community b. political and power structures c. history and culture d. norms and values e. all of the above
An example of the defense mechanism called rationalization is the statement ____
A) "I cannot have the blood work done because I cannot take time off work." B) "I failed the test because the teacher did not cover the material in class." C) "My boss told me to cross out the error on the medical record." D) "I am afraid of heights but do not know why I am."