Which of the following statements is true in the Grammar-Translation Method

A．L1 was maintained as the reference system in the acquisition of L2.

B．L2 was maintained as the reference system in the acquisition of L1.

C．Latin was maintained as the reference system in the acquisition of L2.

D．Latin was maintained as the reference system in the acquisition of L1.

与物流的其他职能有着密切联系，对提高物流运行的效率、推动物流合理化起着重要作用的是( )。

A．运输
B．储存
C．包装
D．装卸