Electronic mail and filing permit a user to compose and transmit a message on an office (71) system. In the early 1970s, the ARPANET community developed a number of such systems which have been heavily used. Through standard message format (72) , several hundred different computers and electronic mail interfaces are specification of how (73) and return addresses should appear on envelopes and which sizes are allowable for envelopes. In the electronic message world, they describe what (74) of characters are required at the (75) of a message to identify the sending and receiving mailboxes.

A．send

B．recipient

C．import

D．discontinuity

患者男性，43岁。医生问患者：“你叫什么名字？”答：“你上课，水流哗哗响，人们兴高采烈，像在两面看，马马虎虎，宝莲灯，有2个问题弄不懂，2只蝴蝶……”这属于什么症状（）。

A.思维奔逸

B.病理性赘述

C.刻板言语

D.思维破裂

E.思维散漫