What do four kinds of lines that depict the great wall refer to

Need hurry need the answers you. which chinese city is located just to the north and west of macao and hong kong? a shanghai b pusan c beijing d guangzhou. 2. what land feature between china and mongolia? a south china sea. b yellow sea c the himalayas d the gobi

Solve for r in the formula v = ir, when i = 5 and v = 15.

How has the geography of india made it difficult for its people to expand before modern technology?