Why was the battle of Stalingrad so challenging for Nazi soldiers?

Describe the technology advancements that lead to explorers being able to sail great distances. [[ps: doesn't explain where. i am only speculating it's in europe.

Which 19th century technological advancement would best allow farmers along the mississippi river in iowa to quickly transport their crops to buyers in louisiana?

The world trade organization (wto), which was formed in 1995, trades without discrimination. which of these best describes what this principle means? all its member countries charge the same prices for basic commodities such as wheat and lumber. b) all its member countries do not trade with countries which had discriminatory racial policies. c) all its member countries trade only with countries that sign the wto agreement. d) all its member countries open their markets equally to all member nations. answer is d