When the adjacency list method is used to store a graph，Which of the statements is(are) true( ) Ⅰ．The space required depends on the number of vertices Ⅱ．The space required depends on the number of edges

A．ⅠandⅡ

B．Ⅰ only

C．Ⅱonly

D．None

轻烃是一种无色透明的液体，组分较轻，易挥发，大量的挥发气可使人窒息。