[ Cardiology Services ]
The structure that prevents the backflow of blood in the heart is known as the____________.
A. septum
B. mediastinum
C. valve
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Abstract Nouns › ViewWhich word is the abstract noun in the sentence: His kindness towards animals is well-known.
A. kindness
B. towards
C. animals
D. well-known
Vocabulary › View
A mathematical phrase involving at least one variable, and sometimes number and operation symbols
A. Algebraic Expression
B. Coefficient
C. Constant
D. Distributive Property
E. Equation
Present Perfect Tense › ViewIt ____ snoweda lot this winter.
A. have
B. has
Grammar › View
Identify the part of speech of the underlined word.
The best breakfast in town!
___
A. Noun
B. Pronoun
C. Verb
D. Adverb
E. Adjective