Questions

An up - selling is getting the customer to spend more money, buy a more expensive model of the same type of product, or add features or warranties that relate to the product viewed or purchased. 

A cross - sell is to get the customer to spend more money by adding more products from other categories than the product being viewed or purchased. 

1) ability to support multiple processors
2) virtual storage
3) source level debugging

The central nervous system ( brain and spinal card ) are invested with the meninges which nourish and protect the system .This again is enclosed inside a bony box which has the skin above it

In the history, Rurik was believed to be the first ruler to consolidate the slavic tribes. He was a Russian leader in the 9th century.

The Whole car  - the body and inside - can be considered to be a hallow conductor. During the thunderstorm the body - i.e, the outside- gets a charge but there will be no charge inside. so the inside is safe.