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问题 单项选择题

透明度原则是世界贸易组织的基本原则之一，其实质是( )。

A．保证贸易环境的稳定性和可预见性

B．一成员应平等地对待外国的产品和服务，在出口成员和进口成员之间实施非歧视待遇

C．一成员应平等地对待其他成员，在不同的成员之间实施非歧视待遇

D．成员方应避免采取扭曲市场竞争的措施

答案

参考答案：A

解析：B、C、D分别涉及国民待遇原则、最惠国待遇原则和公平竞争原则。

单项选择题 A3/A4型题

患者张某，女性，66岁，头晕、头痛、乏力20年，加重伴恶心、呕吐、烦躁不安1天，查体：血压180/130mmHg，意识模糊。左侧肢体活动受限，心界扩大。

该患者最可能的诊断是（）

A.1级高血压

B.2级高血压

C.3级高血压

D.临界高血压

E.高血压危象
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单项选择题

An analog signal’s characteristic quantity representing data may (66) . at any instant, any value within a continuous (67) . For example, an analog signal may follow continuously the values of another physical quantity representing data.

A discrete signal is composed of (68) elements in time, each element having one or more characteristic quantities which can represent data. Examples of characteristic quantities are amplitude, waveform, (69) , and position in time. A digital signal is a special case of discrete signals, in which data are represented by a (70) number of well-defined discrete values that one of its characteristic quantities may take in time.

（69）处填（）。

A．duration

B．period

C．persistence

D．span
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