EXERCISE 11 (C)
1. Name the pairs of perpendicular and parallel lines in the following diagrams:
Z
L
w
D
с
S
R
A
Y
()
B
Р
(ii)
Q
M
N
Х
(iv)
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Answer:
How is sound heard?
2) Explain the work of vocal cords
Step-by-step explanation:
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