New York State Roads - I-87 Exit List. Interstate 87 is a major north-south road in New York state, connecting New York City, Albany, the Adirondacks, and MontrÃ©al. Like Interstate 90, it runs along the Thruway for part of its length and has three sets of exit numbers.
B2 [ C or U ] a substance in a form like air that is neither solid nor liquid: Oxygen, hydrogen, and nitrogen are all gases. poisonous/inflammable/toxic gas. A2 [ C or U ] a substance in a form like air that is used as a fuel for heating and cooking:
Gas is one of the four fundamental states of matter (the others being solid, liquid, and plasma). A pure gas may be made up of individual atoms (e.g. a noble gas like neon), elemental molecules made from one type of atom (e.g. oxygen), or compound molecules made from a variety of atoms (e.g. carbon dioxide). A gas mixture would contain a variety of pure gases much like the air.