A (71) is a data type whose major attributes are determined by the roles governing the insertion and deletion of its elements. The only element that can be deleted or removed is the one that was inserted most (72) . Such a structure is said to have a last-in/first-out (LIFO) behavior, or protocol.

A．quickly

B．recentness

C．recently

D．fast

增值税纳税人兼营不同税率的货物或者应税劳务，应当分别核算不同税率货物或者应税劳务的销售额，未分别核算销售额的，从高适用税率。 ( )