Cross countries skis require a different type of boot. These boots only attach to the ski at the toe allowing your heel to move off the ski as you move. On downhill skis your entire boot is attached to the ski. You can read more about the differences here http://skiing.about.com/od/beginning skiers/a/ccdownhill.htm
There is different types of surfaces for different spikes: track for track spikes cross country for cross country spikes
for different types of skiing such as racing or cross country or ski jumping etc.
Show jumping, dressage and cross country.
No cross-country skiing and skiing are two completely different things. They require different equipment. There are "slope" skis which most people are used to that attach to your foot and boot completely. The cross country skis have your heel loose to make it easier to propel yourself forward. Skiing is done on a slope or mountain and cross country isn't necessarily on a hill. They go across all sorts of terrain.
The elasticity of demand refers to how sensitive the demand for a good is to changes in other economic variables. The different types are: price elasticity, income elasticity, cross elasticity and advertisement elasticity.
cross pollinating
There a number of different subsidy types available. One of the most common is a cash grant subsidy. Other types include tax concessions, in-kind subsidies, cross subsides, derivative subsidies and credit subsides.
The nose, but this may vary from country to country and with different types of racing. For US Thoroughbred racing it is the nose and by which nose REACHES the finish line first.
to cross water and drive on briges
Yes, there were many different types depending on the country they were in, their purpose, and when they were built.
The two types of tourism include domestic tourism and international tourism. In domestic tourism, a local in a country can move to another county or province as a tourist. In international tourism, people cross country borders to visit other countries.
There a number of different subsidy types available. One of the most common is a cash grant subsidy. Other types include tax concessions, in-kind subsidies, cross subsides, derivative subsidies and credit subsides.