Answer:
This is what my teachers say kids cheat and it caussed them not to pay attenion .
Explanation:
<span>the roles that i play in my relationship are :
1. A student. My duty in this role is simply to learn. I should listen to my teacher , pick up the positive things that they thought and ignore the negative things
2. A Son. As a son, my duty is to help whatever duty that my family need me to do
3. a Friend. As a friend, my role is to play with them and listen to them if somehow my friends are feeling down</span>
The readings will generally be quite low. :)
Answer:
the last choice.
Explanation:
veins have valves because venous pressure is often not great enough( as the blood must overcome gravity and other forces) to return the blood to the heart.
valves mainly prevent the back flow of blood.