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问题 单项选择题

中兴通讯ZXWN V3系列商用系统基于（）版本，采用全IP架构设计和开发，已在突尼斯、利比亚、文莱等10几个国家成功应用。

A、R99

B、R4

C、R5

D、R6

答案

参考答案：B

选择题

What's in the classroom?[ ]

A. A board, four lights and many desks.

B. The floor is green.
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单项选择题

During the nineteenth century, Britain’s urban population increased as its rural population diminished. A historian theorizes that, rather than industrialization’s being the cause, this change resulted from a series of migrations to urban areas, each occasioned by a depression in the agrarian economy. To test this hypothesis, the historian will compare economic data with population census data.
The historian’s hypothesis would be most ply supported if which of the following were found to be true

A．The periods of greatest growth in the industrial economy were associated with a relatively rapid decline in the rural population.

B．The periods of greatest weakness in the agrarian economy were associated with relatively slow growth in the population as a whole.

C．Periods when the agrarian economy was comparatively p and the industrial economy comparatively weak were associated with a particularly rapid decline in the rural population.

D．Periods when the agrarian and industrial economies were both p were associated with particularly rapid growth in the urban population.

E．(E) The periods of greatest strength in the agrarian economy were associated with relatively slow growth in the urban population.
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