By using MP3, a 600M-byte music CD can be (70) to 50M bytes or less. It can be streamed (downloaded in chunks)so that you can begin listening to the opening bars while the (71) of the file arrives in the background. And, most important, MP3 music files retain good listening (72) that (73) compression schemes lacked. That (74) of features makes accessing and distributing music on the Web practical for the first time.

A．pressed

B．compressed

C．press

D．compress

访问调查时，下列哪项说法不正确：（）

A.当访问敏感问题（不能匿名），劝说被访者此次调查非常重要，一定要大胆真实地讲出来

B.当访问敏感问题（不能匿名），不宜当面询问

C.访问调查耗费人力、物力和时间，因此只适合在较小范围内使用

D.访问调查获得的许多资料，需要进一步查证、核实