Select all the correct answers. Which three statements are true about all alloys?
They’re made from metals combined in equal amounts.
They’re harder than the pure metals they’re made of.
They’re good conductors of electricity.
They’re brittle and prone to cracking.
They have a metal as their main component.

Cpr, or cardiopulmonary resuscitation, is a first-aid technique to save lives. it involves compressions of the patient's chest cavity. which description is the best description of the functions of chest compressions in cpr? chest compressions are done to pump the heart. chest compressions are done to strengthen the rib bones. chest compressions increase carbon dioxide inhalation. chest compressions allow the patient's muscles to wake up.

Which animal is a producer in this ecosystem

_tissues respond quickly to outside stimuli a) epithelia b)nervous c)muscular d)muscular and nervous