why is SAS curve usually drawn as positively sloped, while the LAS curve is drawn as a vertical line?

In what two ways were the tang and song dynasties of china similar? they jointly built the grand canal. they were economically strong. they had weak military forces. they ruled for about 300 years. they discouraged buddhist ideas.

The pka of three different c―h bonds is given below. explain the observed trend in pka. select the single best answer.

Which is the best location for farming? ( southwest asia ) a: east of the jordan river b: central syria c: southern israel d: the coast of lebanon