在一起购销合同纠纷上诉案件中，一审法院曾依法做出了对被告财产保全的裁定。二审法 院受理上诉后，上诉人(一审被告)对财产保全提供了担保。在这种情况下，应当：()。

A．由一审人民法院裁定解除保全

B．由一审人民法院判决解除保全

C．由二审人民法院判决解除保全

D．由二审人民法院裁定解除保全

In (66) the strength of the carrier signal is varied to represent binary 1 or 0. (67) is a system that can map a name to an address and conversely an address to al name. (68) is a three-way handshaking authentication protocol that it’s packets are encapsulated in the point-to-point protocol. (69) is an approach that enables an ATM switch to behave like a LAN switch. (70) is an guided media which is made of glass or plastic and transmits signals in the form of light.

A．VLAN

B．LANE

C．VPN

D．IPOA