One of the key components of the double-exposition concerto form is the
a. single exposition.
b. chorale.
c. cadenza.
d. theme.

The cadenza is an integral part of a double exposition concerto and is added near the end as a solo.

Ithink this is what you meant. the temperature at which a liquid begins to boil is called the boiling point. the boiling point of water is 212°f or 100°c.  and at that point will start to turn into steam (gas)

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