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问题 选择题

引起蛙冬眠的主要原因         (         )

A．水份

B．温度

C．空气

D．光照

答案

答案：B

由于变温动物的体温随着环境的变化而变化，所以当外界环境温度较低时，变温动物为适应环境的变化，不吃不动进行冬眠，故冬眠是变温动物对低温环境的一种适应方式．

故选B

单项选择题

Representations of software architecture are an enabler for communication between all parties (stakeholders) interested in the development of a computer-based system. An architectural style defines as a family of suchsystems in terms of a ______ of structural organization. More specifically, each ______ describes a systemcategory that encompasses: (1) a set of components (e.g., a database, computational modules) that perform afunction required by a system, (2) a set of ______ that enable "communication, coordination andcooperation" among components, (3)______ that define how components can be integrated to form thesystem, and (4) semantic models that enable a designer to understand the overall properties of a system byanalyzing the known ______ of its constituent parts.

A. grammar models B. code segments C. constraintsD. deliverables
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单项选择题

巡逻队员的确警时间不能超过（）。

A、2分钟

B、3分钟

C、4分钟

D、5分钟
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