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问题 配伍题 B型题

对皮肤损伤较重的外照射治疗机有()
现已普遍使用，但始建于1951年的是()
具有能量高、深度量大、皮肤反应低等优点的是()

A．X线治疗机

B．直线加速器

C．模拟定位机

D．钴∞治疗机

E．放疗计划分流

答案

参考答案：A,D,B

单项选择题

The data station usually means a (71) unit that provides data for transmission, that accepts transmitted data, and that performs all functions necessary for communication with another functional unit. Data stations may be divided into two kinds, the primary stations and the secondary stations, (72) control functions.

In (73) data link control, the primary station is the data station that supports the primary control functions of the data link, generates commands to be transmitted, and interprets received responses. Specific responsibilities assigned to the primary station include initialization of control signal interchange, organization of data flow and actions regarding error control and error recovery functions. The secondary station executes data link control functions as (74) by the primary station, interprets received commands and (75) responses to be transmitted.

（72）处填（）。

A．helped

B．aided

C．in terms of

D．supporting
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单项选择题

“听其言必责其用，观其行必求其功。”这种观点是（）

A.强调认识对实践的作用

B.强调实践对认识的检验作用

C.认为认识可以脱离实践

D.认为实践可以脱离认识
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