Whats the highest mountain in the world?Its QomolangmaHow high is it ?Its 8844.43 meters high.,Dialogue 1,What is the biggest desert in the world?Its the Sahara .How big is it ?Its 9,600,000 square kilometers in size .,Dialogue 2,Dialogue 3,What is the deepest salt lake in the world?Its the Caspian Sea.How deep is it ?Its 1,025 meters deep.,Dialogue 4,What is the longest river in the world?Its the Nile .How long is it ?Its 6,671 kilometers long .,
