Cystic fibrosis affects the cells that produce mucus, sweat, and digestive juices. It causes these fluids to become thick and sticky. They then plug up tubes, ducts, and passageways.
It is an inherited life-threatening disorder that damages the lungs and digestive system.
I’m pretty sure they included more than one independent variable.
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Roads make a crucial contribution to economic development and growth and bring important social benefits. They are importance in order to make a nation grow and develop.
Explanation:
