16. Mechanical lifting of air by the upslope slant of the terrain is called _______
举一反三
- Lifting actions may be provided by several factors except _____. A: rising terrain B: fronts C: convection D: crosswind
- Where warm air replaces cold air it is called a .
- Where cold air replaces warm air, it is called a .
- There are three conditions necessary to create a thunderstorm: air that has a tendency towards ____ some types of lifting action, and relatively high moisture content.
- （） of the A-frames there is a strong cast iron frame called the scavenging air box.