How did Qin Shihuangdi unite the states of northern China? He conquered the other six states and ended the wars. He staged a revolution and overthrew the emperor of China. He formed alliances with the other states and was elected leader. He connected the states by expanding trade routes and improving roads.

what are you saying?

barack obama

i love this guy

two jet streams that directly affect the formation of weather in the continental part are a polar jet and a subtropical jet. they are responsible for the transportation of weather systems, which directly affect people. the polar front is the boundary between cold air from the north pole and warmer equatorial air. both the polar jet and the subtropical jet blow from the west to the east, and follow the boundary between cold and warm air.

the strongest jet streams are polar jets, while subtropical jets are somewhat weaker.

the right answer is c. the polar jet stream is generaly stronger than the subtropical jet stream.