Me pueden ayudar con la descripción de las referencias 9686 y EV3 de Lego y sus diferencias?

Why is the supremacy clause considered to be the root of federalism?

Question #22 when you approach an intersection with a green traffic light, you should choose an a. approach at a speed that will allow you to stop if the light changes. b. be ready to speed up if the light turns yellow. c. always slow down by a few miles per hour, in case you need to stop.

In which of the following situations must you cross at least two different streams of opposing traffic? a. changing lanes b. turning left c. turning right