甲、乙两家为同一专业的工程承包公司，其资质等级依次为一级、二级。两家组成联合体，共同投标一项工程，该联合体资质等级应（）。

A.以甲公司的资质为准

B.以乙公司的资质为准

C.由主管部门重新评定资质

D.以该工程所要求的资质为准

(1) In the strength of the carrier signal is varied to represent binary 1 or 0.

(2) is a system that can map a name to an address and conversely an address to an name.

(3) is a three-way handshaking authentication protocol that it’s packets are encapsulated in the point-to-point protocol

(4) is an approach that enables an ATM Switch to behave like a LAN switch.

(5) is an guided media which is made of glass or plastic and transmits signals in the form of light.

5（）

A．Coaxial cable

B．Optical fiber

C．Unshielded Twisted-pair Cable

D．Shielded Twisted-pair Cable