Billie Eilish: The Worlds a Little Blurry, comes out in 2 days and I still don't know how I am gonna watch it!

Usha is giving a presentation on the cardiovascular system. one of her slides shows a diagram of the blood moving from the heart to the arms and legs. which type of circulation is the slide illustrating? systemic circulation pulmonary circulation systolic circulation diastolic circulation

Why is it essential to operationally define the variables in a study?

To what extent was the chinese exclusion act a turning point in american foreign policy