[ Cardiology Services ]
An EKG is a procedure that uses __________ to assess the function of the heart.
A. sound waves
B. electricity
Select your answer:
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Grammar › ViewI enjoyed the film. It was ___________.
A. dull
B. exciting
C. easy
D. happy
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The desert is a difficult _____ for people to live in.
A. country
B. environmental
C. environment