A- valve replacement
b- stents
x- heart transplant
<span>A special interest group work hard to get a rider attached to a bill b</span>ecause many special-interest groups try to get something unrelated into a bill and to benefit the group.
Answer:
sour, corrosive
Explanation:
An acid is a substance that donates hydrogen ions. Because of this, in an acidic solution there are more hydrogen ions than hydroxide ions. This means the more acidic a food is, the more hydrogen ions are available to trigger the sour taste receptors. A base is a substance that accepts hydrogen ions.