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问题 单项选择题

下面关于COSPAS/SARSAT系统的说法正确的是（）

A、用于A1、A2海区

B、主要用于A1、A2和A3海区

C、主要用于A4海区

D、A/B和C都不正确

答案

参考答案：D

单项选择题

In data communication, data link is those parts of two data terminal equipments that are controlled by a protocol along with the (71) data circuit, which together enable data (72) . So-called protocol means, in short, a set of rules that determines the behavior of functional units in achieving communication.

Data circuit, however, consists of a pair of (73) transmission channels that provides a means of two-way data transmission. Between data switching exchanges, the data circuit may or may not include data circuit-terminating equipment (DCE), depending on the type of (74) used at the data switching exchange. Between a data station and a data switching exchange or data concentrator, the data circuit includes the DCE at the data station end, and may include equipment (75) to a DCE at the data switching exchange or dam concentrator location.

（71）处填（）。

A．handshaking

B．interconnecting

C．linkage

D．joining
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单项选择题 A1/A2型题

法律责任是指（）

A.国家机关对违法者所给予的惩罚措施

B.违法主体所应承担的法律后果

C.违反行政法规的行为

D.违反民事法规的行为

E.违反刑事法规的行为
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