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问题 单项选择题

一老年患者患直肠低分化腺癌，肿瘤下缘距肛缘7cm，术中见肿块巨大，与盆腔和骶部固定，最适宜的手术是（）

A.拉下式直肠癌切除术

B.Miles手术

C.Dixon手术

D.Hartmann手术

E.仅作乙状结肠造口术

答案

参考答案：E

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.

（73）处填（）。

A．dependent

B．conformable

C．consistent

D．associated
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判断题

10kV接入系统的分布式电源电站内需配置UPS交流电源，供关口电能表、电能量终端服务器、交换机等设备使用。
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