听力原文:What happens when nicotine is absorbed into a person's blood stream?(29)A.It is a
听力原文:What happens when nicotine is absorbed into a person's blood stream?
(29)
A.It is a powerful and fast-acting drug.
B.It causes the familiar yellow and brown stain.
C.Increased heart rate, and blood disease.
D.Increased heart rate, and blood pressure.