For each blank, choose the best answer from the four choices and write down on the answer sheet. （66） is a protocol that a host uses to inform a router when it joins or leaves an Internet multicast group. （67） is an error detection code that most data communication networks use. （68） is an interior gateway protocol that uses a distance vector algorithm to propagate routing information. （69） is a transfer mode in which all types of information are organized into fixed form cells on an asynchronous or non-periodic basis over a range of media. （70） is an identifier of a web page.

69（）

A．ISDN

B．X.25

C．Frame Relay

D．ATM

招标人采用经评审的最低价法时，中标人的投标至少应当符合（）

A、投标价格最接近标底

B、能够满足招标文件实质性要求，并且经评审的投标价格最低并不低于成本

C、投标价格最低

D、能够最大限度地满足招标文件中规定的各项综合评价标准