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问题 选择题

Watching TV ________ is bad for your eyes. [ ]

A. too much

B. much too

C. too many

D. very much

答案

答案：A

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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单项选择题

当大豆顶芽分化时植株已处于老龄阶段，则形成（），顶端叶片小、花稀、荚也少。

A、无限结荚习性

B、有限结荚习性

C、亚有限结荚习性

D、亚无限结荚习性
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