What were the two usages of radioactive isotopes mentioned in the textbook?

An alliance of two political parties is know as? a. majority b. coalition c. candidate d. government

The low and midlevel clouds that look like cotton balls are

Why did trade along the silk road increase after it fell under mongol control? o people stopped using camels the mongols paved the road o it became safer to travel the mongols were better traders next question ask for